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1 Physics Paper 1 Section I (40 Marks) (Answer all the Questions) Question 1 1. A base ball is thrown vertically upwards. When will it have maximum and minimum velocity? 2. When is a body said to have acceleration? 3. What do the following v-t graphs represent? (a) (b) 4. A stone thrown up at 10 ms -1 reaches a maximum height of 40m. Find its maximum velocity, minimum velocity, time of ascent and time of descent (Take g = 10 ms -2 ). [4] Question 2 1. While measuring the diameter of a bob of a simple pendulum, the main scale of the vernier callipers reads 2.45cm and 4 th division on the vernier scale coincides with the main scale. There are 10 divisions on 1 cm on the main scale and 10 vernier divisions are equal to 9 divisions on the main scale. Find the least count and the diameter of the bob in centimetre and metre. [4] 2. Find the order of magnitude of the following:- a) x 10-6 m b) x 10 6 kg. 3. Write in the correct form for the following units. a) Joule b) mts/sec c) joule/kg/k d) N-s-m When the headscale of a screw gauge is rotated 5 times 10mm are exposed. The head scale contains 50 divisions. Find the pitch and least count of the screw gauge. Question 3 1. Mention any two basic forces in nature. 2. Distinguish between scalar and vector quantity. Give two examples for each. [4] 3. Find the acceleration produced in a body of mass 3kg when a force of 18N acts on it. 4. Define momentum? How is it measured? What is its direction? Write its S.I. Unit? 1

2 Question 4 1. What is fluid thrust? Give its S.I. unit. 2. Name any two factors on which the pressure at any point inside a liquid depend 3. State Pascal s law. Give any two application of it. 4. Express the relationship between the weight W of the body which acts in the downward direction and the buoyant force or the upward thrust W which acts in the upward direction.[3] (a) (b) (c) 5. Mention the S.I unit of pressure [1] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. On a humid day, the sound of a siren is heard quicker. Why? 2. While doing an experiment to determine the acceleration due to gravity of a particular place using simple pendulum, what is its time period if its length is 60 cm? (Take g = 9.8 ms -2 ) 3. What is SONAR? Mention any one of its use. 4. Derive the relationship between the velocity, frequency and wavelength of a sound wave. 5. Give any two difference between longitudinal and transverse waves. Question 6 1. An object is at a distance of 30 cm from a concave mirror of focal length 8 cm. What is its radius curvature? Find the position of the image by drawing. [3] 2. How many images are formed when two plane mirrors are parallel? [1] 3. What is the minimum height required for a plane mirror to show a person s full image? [1] 4. Give any two applications of concave mirrors. 5. Complete the following diagrams: [3] a) b) c) O F O F F 2

3 Question 7 1. Which instrument is used for measuring the following:- [4] a) The growth of the stem of a plant. b) The diameter of the inner gap in a compact disc. c) The time taken for 20 oscillations in a simple pendulum. d) To find the unknown level of water in a beaker. 2. What is the principle of a periscope? Where is it used? 3. Distinguish between uniform velocity and average velocity. 4. a) What is the distance travelled by light in one month? (1 month = 30days) b) What is the distance travelled by sound in one hour at 0 o C? Question 8 1. At sea level, the atmospheric pressure is 1.04 x 10 5 pa. Assuming g = 10ms -2 and density of air to be uniform equal to 1.3kg m -3, find the height of the atmosphere. 2. Give two reasons why water is not a barometric liquid. 3. A block of wood is floating on water with its dimensions 25cm x 25cm x 25cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 ms A block of wood floats in water with 1/5th of its volume above the surface. Calculate the density of wood. [ Take density of water as 1gcm -3 ] 5. a) What is centre of buoyancy? b) State the principle of floatation. Question 9 1. The coefficient of cubical expansions of copper is 5.1 x 10-5 per o C. Calculate its coefficient of linear expansion. 2. What is anomalous expansion of water? State any one of its consequence. 3. Calculate the normal temperature of the human body (98.4 o F) on the celsius and kelvin scale.[3] 4. a) Why is a ventilator provided in a room? [3] b) Why a room heater is installed near the floor of the room? Question What causes electrification of two bodies when a) they are rubbed together? b) what is an ion? 2. What is the purpose of an electroscope? Name any two electroscopes. [3] B A F 3. In the electric circuit shown below, label different parts A,B,C,D,E,F. [3] 4. Mention any two factors on which the electrical C resistance of a wire depend. E D 3

4 Physics Paper 2 Section I (40 Marks) (Answer all the Questions) Question1 1. An aeroplane flies towards north and covers 300 km in 20 minutes. Calculate its velocity in a)kmph b)ms Define the term uniform acclereation. [1] 3. Draw the position - time graph of a body undergoing uniform velocity. [1] 4. A man rows his boat at a uniform acceleration at the rate of 10 ms -1 in 10 seconds. He then stops rowing and the boat comes to rest in the next 10 seconds. [3] a) Draw the velocity-time graph.b) Distance covered with uniform acceleration. c) Calculate the average retardation. 5. A stone is vertically thrown upwards. It takes 5 s to return to the thrower. Calculate the maximum height attained by the stone (Take g = 10ms -2 ). 6. Convert 20 ms -1 into kmph. [1] Question 2 1. Give any two examples of inertia of rest. 2. Calculate the linear momentum of electron of mass 9 x kg moving with the velocity of 5 x 10 7 ms A force of 15 N acts on a glass ball of mass 500 g for 10s. Assuming the ball to be initially at rest, find its a) final velocity b) distance covered. 4. A bullet fired with a force of 4200 N hits a wooden plank and stops. If the bullet is having a mass of 25g and velocity of 400 ms -1. What is the distance travelled by the bullet in the wooden plank? 5. State Newton s law of gravitation. Mention the unit of universal gravitational constant. Question 3 1. How do car radiators work? 2. What are three main kinds of wind that blow over the globe? [3] 3. Give any two applications of heat radiations. 4. Explain the following : a) Why are cloudy nights warmer than the calm and clear nights? b) Dirty snow melts faster than the clean snow. Why? c) Why do people prefer to wear white clothes to dark clothes in summer? [3] Question 4 1. Distinguish between real image and virtual images for a mirror 2. Define the following terms in relation to a concave mirror. 4

5 a) Pole b) aperture c) focal length d) radius of curvature. 3. From the diagram below, show the formation of image by taking two rays from point X. State four characteristics of the image. [3] M C Y x 4. Explain how a concave mirror is used as a shaving glass 5. Where should the object be placed before a concave mirror to get the same size of image as that of the object. [1] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. What is the most convenient unit of mass you will use to measure? a) mass of a cricket ball b) a medicine capsule. 2. What are the order of magnitudes of the following quantities? a) 1.7 x kg b) m c) 9.1 x kg d) s 3. The least count of a vernier calliper is 0.01cm and it has an error of +5.While measuring the length of the cylinder, the reading on the main scale is 8.40cm and the 7 th division coincides with the main scale. What is the length of the cylinder. 4. The thimble of a screw gauge has 100 divisions for one rotation. The spindle advances 1 mm when screw is turned through two rotations. a) What is the pitch of the screw? b) What is the least count of the screw gauge? 5. a) What is a seconds pendulum? b) What are the two factors on which the time period of a simple pendulum depends? Question 6 1. An electromagnetic radiation has a wavelength of 800. If the velocity of the radiation is 3 x 10 8 ms -1, what is its a) Frequency b) time period. 2. The wavelength and frequency of a sound wave in a certain medium is 100cm and 2000 Hz respectively. If the wavelength is changed to 125 cm, in the same medium, calculate a)velocity of sound b) new frequency. 3. A ripple tank produces waves at the rate of 100/min. The distance between one crest and the next crest in 4.5 cm. Calculate (i) time period (ii) wave velocity. 4. How do bats manage to avoid obstacles in its way while flying? 5. Mention any two characteristics of a medium. P 5

6 Question 7 1. Define the following: a) electric conduction b) electrostatic induction. 2. A charge of 100 C flows through a conductor for 2 minutes. Find the magnitude of current flowing through a conductor. 3. With a neat labelled diagram of a simple voltaic cell, show the direction of flow of electric current and flow of electrons. [4] 4. Distinguish between geographic meridian and magnetic meridian. Question 8 1. Draw a diagram showing two bulbs connected in parallel to a dry cell [1] 2. Draw the symbols of the following elements in an electric circuit a) fixed resistance b) inductor c) cell d) rheostat. 3. Mention any two properties of magnetic lines of force. 4. Why is the knowledge of declination important for the navigators? 5. Explain, why steel is used in preference to soft iron for making permanent magnets. 6. Why do lines of magnetic force never cross? [1] Question 9 1. Calculate the pressure exerted by 1 m vertical length of alcohol of density 0.80 g cm -3 in S.I. units (Take g = 10 ms -2 ). 2. Pressure in a water pipe on the ground floor of a building is 100,000 pa. Calculate the pressure in the water pipe on the first floor at a height of 5m. [Density of water = 1000 kg m -3 ; g = 10 ms -2 ] 3. A solid weighs 0.16 kgf in air and kgf in water. Find (i) R.D of solid. (ii) Density of solid in S.I units. [Density of water = 1000 kg m -3 ]. 4. State Pascal s law. 5. Why does a ship made of iron float while an iron nail sinks in it? Question Convert 75 o C into a)kelvin b) Fahrenheit scales. 2. State any two disadvantages of thermal expansion of solids. How they are rectified? 3. Calculate the initial length of a metal rod at 25 o c if increase in length of this rod is 2 cm when heated to C. [Given α for metal rod = 15 X 10-6 / o C] [3] 4. How do fishes survive in frozen lakes? [1] 5. Name any two properties of radiant 6

7 Physics Paper 3 Section I (40 Marks) (Answer all the Questions) Question 1 1. When is a body said to be a) at rest b) in motion. 2. What is acceleration due to gravity? What is its value on the earth? 3. Express 100 Kmh -1 in ms -1. [1] 4. A train takes 3 hours to travel from Bangalore to Mysore with a uniform speed of 70 Kmph -1. What is the distance between the two cities? 5. The figure shows the velocity- time graph of a particle in a straight line. [3] a) How long does the particle accelerate? b) What is its deceleration? c) What is the total distance travelled by the particle? Question 2 1. Define linear momentum. What is its S.I. Unit? 2. What is the cause of motion of a body from rest? What is the SI unit of that physical quantity? 3. A car of mass 500 kg moving at a speed of 60 km per hour is stopped in 10s. Calculate the force applied by the brakes. 4. Distinguish between mass and weight. 5. When a shot is fired from a gun, the gun gets recoiled. Explain. Question 3 1. In a hydraulic machine, a force of 15 N is applied on the position of area of cross section 200 cm 2. What force is applied on its piston of area of cross section 300cm 2? 2. Name two applications of Pascal s law. 3. Name the two factors which affect the atmospheric pressure when we go up. 4. Convert 15 mm of Hg into pascal. Take density of mercury = 13.6 x 10 3 kg m -3 and g = 9.8 ms A cube of side 3cm is placed inside a liquid. The pressure at the centre of one face of cube is 5 pa. Calculate the thrust exerted by the liquid on this face. Question 4 1. Distinguish between an atom & an ion. 7

8 2. The charge of a body is +5 milli coulomb. Find the number of electrons in excess or deficit on the body. 3. Draw a neat labelled diagram of a gold leaf microscope. 4. What is a lightning conductor? Which metal is used for making it? 5. What is the minimum possible charge? [1] 6. What do you mean by the quantum nature of charge? [1] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. The incident ray and the reflected ray from a plane mirror are mutually perpendicular. Find the glancing angle of incidence. Show the phenomenon with a ray diagram. 2. An object A is at a distance 100 cm in front of a plane mirror M. If the mirror is now moved 30 cm away from A, how does the image shift from its previous position? 3. Complete the following by means a ray diagram. F a) b) 4. State the relationship between the focal length and the radius of curvature for a spherical mirror. [1] 5. State the types of mirrors used by [3] a) a dentist b) a hair dresser in a salon c) a driver to view the vehicles approaching from behind. Question 6 1. State any two differences between a transverse and a longitudinal waves. 2. Obtain the relationship connecting the velocity, frequency and wave length of a wave. 3. How do temperature and humidity affect the velocity of sound in air? 4. A wave generator produces 50 crests and 50 troughs in 0.5 second. What is the frequency of the wave? 5. What is the audible range of frequency for human ear? [1] 6. What is the velocity of ultrasonic sound in air at 0 o C? [1] Question 7 1. Give any two difference between heat and temperature. 8

9 2. Why do telephone wires sag in summer and become tight in winter? [1] 3. Why does your school clock show different times by a few seconds in winter and summer? [1] 4. How much heat should be given to a brass rod if its length should be increased by 0.5%? ( Given α= C -1 ) 5. The length of mercury thread in a thermometer rises by 10 cm when it is transferred from dry ice to steam. If the thermometer is to be calibrated in 0 C, find the size of one degree. 6. Give any two applications of thermal expansion. Question 8 1. A body weighs 300gf in air and 200gf when completely immersed in water. Calculate a) the loss in weight of the body in water b) the upthrust on the body. 2. State Archimede s principle. Describe an experiment to verify Archimede s principle.[3] 3. What is the centre of buoyancy? [1] 4. The relative density of silver in What is its density in S.I. unit? 5. What is a hygrometer? State the principle on which it works. Question 9 1. Which of the following are not fundamental units? Kelvin, joule, ampere,newton, mole, second. 2. Complete the following : a) 1 μg =...kg b) 1 fermi =...m 3. The pitch of a screw gauge in 0.5 mm and the head scale is divided into 50 parts.what is the least count of screw gauge? 4. What is the backlash error in a screw gauge? How is it avoided? 5. What happens when a simple pendulum is taken to the moon which has no atmosphere and acceleration due to gravity is one sixth that at earth s surface? Explain. Question Find the current when 1μe of charge passes through a cross section of a conductor in 10s. 2. What is the relationship between volt, joule and coulomb? 3. How is the resistance of a wire affected when a) its length doubled b) radius doubled? 4. State any two evidences of the existence of earth s magnetic field. 5. Distinguish between a natural and an artificial 9

10 Physics Paper 4 Section I (40 Marks) (Answer all the Questions) Question 1 1. How can you find a) displacement from the velocity - time graph? b) Velocity from the displacement - time graph? 2. A parcel dropped from a stationary helicopter, at a height of h from ground level, reaches the camp in 15s. Calculate the (i) value of h. (ii) final velocity when it reaches the ground. (Take g = 9.8 ms -2 ). [3] 3. In the displacement- time graph given below, the motion of two cars A and B along a straight road in the same direction is given. a) Which car has greater velocity? b) When and where did B overtake A. Displacement (km) A B What is free fall? time (t) hour [1] 5. Distinguish between uniform velocity and average velocity in motion along a straight line. Question 2 1. Derive the relation between newton and dyne. 2. When you get away from a boat, it tends to leave the dock. Explain. 3. A bullet of mass 50 g and moving with a certain velocity hits a wooden block with a force of 200 N. Find the velocity of the bullet if it penetrates 50 cm. [3] 4. Give any two examples of inertia of motion. 5. How is the effective length of the simple pendulum calculated? [1] Question 3 1. Draw diagrams to illustrate regular and irregular reflection. 2. Give any two differences between real image and virtual image. 3. With a neat diagram, for a plane mirror, prove that for a given incident ray, when the mirror is turned through an angle θ, the reflected ray turns through 2θ. [3] 4. Calculate the number of images formed in two plane mirrors, when they are held at an 10

11 angle a) 60 o b) 30 o. 5. Define lateral inversion of the image due to a plane mirror. [1] Question 4 1. Distinguish between base effect and shrill effect of sound on the human ear. 2. Give any two uses of ultrasonic vibrations. 3. Obtain the relation between frequency and time period. 4. Two turning forks X and Y of frequencies 500 Hz and 400 Hz respectively are vibrated in air. If the wavelength of X is 2 m, what the wavelength produced by Y? 5. Compare light waves and sound waves. Section B (40 Marks) (Answer Any Four Questions) Question 5 1. A solid of density 3200 kgm -3 is found to weigh 0.80 kgf in air. If 5/8 of volume of solid is completely immersed in the brine solution of density 1200 kgm -3, find the apparent weight of solid in brine. [3] 2. What is relative density of a substance? ]1] 3. Mention the three characteristics of a floating body? [3] 4. An ice berg floats in sea water of density 1.17 gcm -3, such that 1/6 of its volume is above sea water. Find the density of ice berg. 5. When does the lactometer measure the purity of milk accurately? [1] Question 6 1. What is a thermostat? On what principle does it work? 2. A metal cube of side 10 cm at 30 o C on heating to 600 o C increases by 0.2 cm. Calculate the coefficients of linear, superficial and cubical expansion. [3] 3. Distinguish between trade winds and polar winds. 4. What is the order of frequency of radiant heat? [1] 5. Why do cooking utensils are kept black from below and shining from the sides? Question 7 1. Give any two characteristics of a standard unit? 2. What is zero error in a vernier calliper? How do you correct it? 3. The head scale of a screw gauge has 100 divisions. If the distance uncovered on the pitch scale is 2 mm for four complete rotations. Calculate (i) pitch (ii) least count. 4. Calculate the time period of the simple pendulum of length 1.5m, when acceleration due to gravity is 9.8 ms Give any two precautions while measuring the mass of a body in a physical balance? 11

12 Question 8 1. What are conductors? Give an example. 2. How is a high rise building protected from lightning? 3. Define a) 1 Volt b) 1 Coulomb. 4. A charge of 1000 C flows through an electric circuit in 5 hours. Calculate the magnitude of current in the circuit. 5. Draw a neat diagram showing (i) closed electric circuit (ii) open electric circuit. Question 9 1. Draw the symbols of the following: (i) Variable resistance (ii) Inductor (iii) Cells in series (iv) fixed resistance. 2. Give any two methods of demagetising a magnet. 3. Draw the displacement time- graph for a stationary object. 4. Define thermal conduction. Mention a good conductor among non-metals. 5. Complete the diagram. O C (a) (b) Question What is the linear momentum of electron of mass 9.1 x kg moving with a velocity of 6 x 10 7 ms -1? 2. A bike rider with his bike weighs 200 kg. While driving at 80 kmh -1, he stops the bike over a distance of 10m. Find the retarding force on the brakes. 3. During rainy season, the mud is splashed off to the man standing behind a bike when it starts moving. In which direction does the mud get splashed? What physical phenomenon is explained in this? 4. Find the acceleration and the total distance covered by the body in the following v-t graph. 5. Write IN and IJ in the form of fundamental units. 15 A V ms 10 5 B O t (s) O P F C 12

13 Physics Paper 5 Section I (40 Marks) (Answer all the Questions) Question 1 1. Distinguish between rest and motion 2. A car travels first 30km with a uniform velocity of 60 kmh -1 and the next 30 km with a uniform velocity of 40 kmh -1. Calculate (i) the total time of the journey (ii) the average speed of the car. [3] 3. If the displacement-time graph is a straight line parallel to the time axis, what does it represent about the motion of the body? [1] 4. From the velocity- time graph given below, find the total distance travelled by the body. [3] V(ms -1 ) A D E 5. Draw acceleration-time graph of a body moving with uniform velocity. [1] Question 2 1. Give any two examples of inertia of rest. 2. a) While catching a cricket ball, a seasoned cricketer withdraws his hands during the catch. Why? b) Why are vehicles provided with shock absorbers? 3. What force is required to produce an acceleration of 5 ms -2 in a body of mass 10 kg? 4. Name any two illustrations to express Newton s third law of motion. 5. Calculate the gravitational force of attraction between the two bodies of masses 100 kg and 200 kg separated by a distance of 10m. Take G = 6.7 X Nm 2 Kg -2 Question 3 1. A screw gauge has a pitch equal to 0.5mm. How many divisions are there on the head scale if its least count is mm? 2. What is backlash error in a screw gauge? How is it avoided? 3. Complete the following: a) 1 ml = m 3. b) 1 litre = cm a) What is a seconds pendulum? B C t (s) 13

14 b) It takes 0.2s for a pendulum bob to move from mean position to one end. What is the time period of the pendulum? 5. Mention any two precausions while using a beam balance. Question 4 1. What are the characteristics of the image formed by a plane mirror? 2. The incident ray and the reflected ray from a plane mirror are mutually perpendicular to each other. Show the angle of incidence and angle of reflection. Draw a neat diagram to show the reflection phenomenon. [3] 3. Complete the diagrams with the help of straight lines. a) b) 4. Write any three characteristics of the image for an object kept at a distance of 40 cm from a concave mirror of focal length 15 cm. [3] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. State any three laws of liquid pressure. [3] 2. A circular plate of radius 5m is placed horizontally 1m below the surface of water.the atmospheric pressure is x 10 5 Nm -2. Calculate the total thrust on the plate. (Density of water = 10 3 kgm -3, g = 9.8ms -2 ) [3] 3. Explain the action of rubber suckers used as hooks in the kitchen and bathroom. 4. What are the advantages of using mercury as a barometric liquid. Question 6 1. A body weighs 300 gf in air and 280 gf when completely immersed in water. Calculate (i) the loss in weight of the body in water. (ii) the upthrust on the body. 2. It is easier for a man to swim in sea water than in fresh water. Explain. 3. The volume of a balloon is 2000m 3. It is filled with helium if density 0.18 kgm -3.What maximum load can it lift? Density of air 1.29 kgm -3. [3] 4. Why is a hygrometer used in an acid battery? [1] 5. The relative density of mercury is State its density in (i) C.G.S unit (ii) S.I unit. 14

15 Question 7 1. Name any two factors that contribute to the linear expansion of rod. 2. A metallic washer of internal diameter 10cm is heated by 500 o c. If the coefficient of linear expansion of a metal is 1.8 x 10-5 o C -1. What will be its final diameter? 3. a) What is the density of water in S.I unit? b) At What temperature is it maximum? 4. What are the given temperature corresponding to? a) 86 o F in celsius scale.b) 100 o C in kelvin scale. 5. a) Why in cold countries windows have two glass panes with a thin layer of air between them? b) How can the radiating power of a surface be increased? Question 8 1. A wave pulse on a guitar string moves a distance 0.5 m in s. Calculate a) the velocity of the pulse b) the wavelength of wave on string if its frequency is 300 Hz. 2. Define the term wave velocity. What is its S.I. unit? 3. Name the sounds of the frequencies given below: a) 15 Hz b) 2000 Hz c) Hz d) 40 MHz. 4. Give any two applications of ultrasound. 5. The heart of a man beats 72 times a minute. What is its frequency and time period? Question 9 1. What is static electricity? Mention any one method of charging. 2. What is quantum nature of charge? What is the minimum possible charge? 3. What causes electrification of two bodies when they are rubbed together? [1] 4. A truck transporting fuels like petrol and diesel has a metal chain dangling to the ground. Explain. 5. The charge on a body is -2c. Find the number of electrons in excess or deficit on the body. 6. Which material is used for the rod (or stem) in a gold leaf microscope? [1] Question Distinguish between a primary and a secondary cell. Give an example for each. [4] 2. Calculate the current in the motor when it is switched on for 0.5s and 20C of charge passes through the coil. 3. Give any two factors that affect the resistance of a conductor. Explain as to how they contribute to the increase or decrease of resistance. 15

16 Physics Paper 6 Section I (40 Marks) (Answer all the Questions) Question 1 1. Can the displacement be zero if the distance is not zero? Explain your answer with an example. 2. Which of the following has the largest inertia? Explain with reasons. a) a bus b) a motorcycle c) an aircraft carrier d)a bicycle. 3. Distinguish between speed and velocity. 4. Determine the distance travelled by the body from the following velocity- time graph.[4] Question 2 1. Light travels at a speed of 3 x 10 8 ms -1. a) Calculate the distance travelled by light in one year (365 days) in km. b) What is the distance obtained in the above question known as? [3] 2. The ratio between the lengths of two simple pendulums is 25:36. What is the ratio between their a) time period b) frequency. 3. A hockey ball at rest is hit by a hockey stick so that the force acts on the ball for 0.05 s. It acquired a velocity of 20 ms -1 in 2 second. Calculate the force acting on the ball if its mass in 250 g. [3] 4. Identify the laws of motion that can describe the following acts. a) Dusting off a carpet. b) A swimmer sweeps his hands backward to move ahead in water. Question 3 1. State the derived units of : a) momentum b) moment of a force. 2. If the pitch of the screw in 1mm, find the reading represented in the following diagram. [3] 3. How will you measure the volume of an object that floats in water? 16

17 4. Fill the blanks: a) 1 μ = m.b) 1 picofarad = farad.c) 1 gigapascal = pascal.[3] Question 4 1. Name the mode of transmission of heat through a) solids b) liquidsc) gases d) vacuum. 2. Distinguish between heat and temperature 3. Give the definitions of the following a) coefficient of linear expansion. b) coefficient of cubical expansion. 4. How do you detect heat radiations? Explain any two phenomena. [4] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. An object is kept at a distance of 30 cm in front of a convex mirror of focal length 15 cm. Where is the image formed? Draw a diagram to illustrate this. [3] 2. Complete the following ray diagrams. A B D C (a) (b) 3. A person is sitting in front of a plane mirror at a distance of 100cm from it. a) where is his image formed? b) What is the distance between the person and his image. 4. State the laws of reflection. 5. Give any one difference between the real and virtual image. [1] Question 6 1. a) What is lateral pressure? b) What is fluid pressure? 2. Name any two factors which affect barometric height. 3. Mention any two advantages of aneroid barometer over simple barometer. 4. Calculate the pressure exerted by 100 cm of vertical length of water column in SI units. ; density of water = 1000 kgm -3 ] 5. In a building, the pressure of water on the ground floor is 1.6 x 10 5 pa. Calculate the pressure at the fifth floor at a height of 15 m. [ Take g = 9.8 ms -2 ; p water = 1000 kgm -3 ] Question7 1. A cylindrical body of area of cross section m 2 and length 1.2 m is completely C F P 17

18 immersed in water. Calculate (i) the weight of cylinder in SI system. (ii) upthrust acting on the cylinder in SI system. [ g = 10ms -2 ; density of solid = 7200 kgm -3 ] 2. Mention any applications of law of floatation. 3. a) Why are bimetallic strips used in automatic fire alarm? b) What is the principle of a balance wheel? where is it used? [3] 4. There is a constant difference in lengths of an iron rod and a brass rod found to be 2cm when they are heated through the same range of temperature. Calculate the length of each rod. (Given : Coefficients of linear expansion for iron and brass are 12 x 10-6 / o C and 18 x 10-6 / o C respectively). [3] Question 8 1. What are bass and shrill effect on the human ear? 2. What are material waves? Give any two examples. [3] 3. The wavelength of vibrations produced on the surface of water is 1 cm. If the wave velocity is 20 ms -1, Calculate (i) the number of waves produced in one second (ii) the time required to produce one wave. 4. What is Galton s whistle? To what use is it put? 5. Draw a displacement-time graph for a sound wave. [1] Question 9 1. Give any two uses of an electroscope. 2. a) Define electric conduction. b) What is electrostatic induction? 3. Define surface density of charge. What is its unit? 4. What are lightning arrestors? Mention any one of its use. 5. Draw the distribution of charge on the two conductors given below. Sperical conductor (a) (b) Conical Conductor Question Define the terms a) electric potential b) potential difference C of charge is brought from infinity to a certain point in an electric field when 100 J of work is done. What is the potential at that point? 3. Distinguish between a primary cell and a secondary cell. Give any one example for each. [4] 4. State any two properties of magnetic lines of 18

19 Physics Paper 7 Section I (40 Marks) (Answer all the Questions) Question 1 1. a) What is measurement? b) What is a unit? c) What is meant by magnitude of a physical quantity? [3] 2. Express the order of magnitude of the following quantities. a) m b) 9.1 x kg. 3. Define a) Least count of a vernier callipers. b) pitch of a screw gauge. 4. What is effective length of a simple pendulum? How is it measured? 5. What is a best fit line for a graph? [1] Question 2 1. A car covers 100 km in 2 hours towards east. Calculate its velocity in a)kmh -1 b) ms Draw a displacement - time graph for a body undergoing uniform motion. 3. What do the following graphs represent? 4. A car initially at rest picks up a velocity of 90 kmh -1 in 8 second. Calculate (i) the distance covered by the car. (ii) the acceleration of the car. 5. What is the significance of a) Slope of a distance - time graph. b) Area of a velocity - time graph. Question 3 1. State Newton s first law of motion and hence define the term inertia. 2. A biker along with his bike weighs 200 kg. While driving at a speed of 80 kmh -1 he spots a man at a distance of 10m from him. Find the retarding force offered by the brakes if he just avoids a collision with him. [3] 3. What is meant by weight of a body? Mention its SI unit. 4. Give any two examples of natural forces. 5. Convert 50 kmh -1 into ms -1. [1] Question 4 1. a) State pascal s law. b) Mention any two uses of Hydraulic press. [3] 19

20 2. How does the pressure vary in the following cases? a) When we go from the ground to a higher altitude. b) When we dive into the sea to reach the sea bed m vertical height of liquid exerts a pressure of pa. If g = 9.8ms -2, find the density of the liquid. 4. a) Define relative density of a substance. b) what is its unit? c) what is the CGS unit of force? [3] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. Write any two differences between heat energy and temperature. 2. Give at least two reasons for the choice of a thermometric liquid. 3. What is absolute zero? What is its significance? 4. When will the two thermometers of Farenheit and Celsius scale show equal but opposite in values. 5. a) what is the SI unit of coefficient of linear expansion? b) What is a bimetallic strip? Question 6 1. What is frost bite? what causes it? 2. Why does an Igloo, made of snow, keep warm? 3. What are sea and land breezes? what causes them? [3] 4. Distinguish between reflecting power and absorbing power of a body. 5. Mention any ONE use of thermopile. [1] Question 7 1. Give any two characteristic of the image formed in a plane mirror? 2. What is the principle of a periscope? Give any two uses of periscope. [3] 3. Define the following terms for a spherical mirror. a) Pole b) Aperhere c) principle focus. [3] 4. Complete the following ray diagrams. where AB is the object in front of the mirrors. A C B F (a) (b) P A B P F C 20

21 Question 8 1. If the frequency of a wave is 200 khz, what is its time period? 2. What is the distance between the bell and a person who hears the sound from it after 3Second when it is struck? (Given velocity of sound in air = 345 ms -1 ] 3. What is the frequency range of audible sound? [1] 4. What is a longitudinal wave? Give an example. 5. From the following graph find out the (i) amplitude (ii) time period (iii) frequency of the wave. [3] (m) Displacement Time(t) second Question 9 1. Draw a diagram to illustrate the function of a lightning conductor. What is its principle? [4] 2. What are accumulators? Give an example. 3. What do the following symbols represent? [3] 4. Which of the following is a scalar quantity? a) Resistance b) Electric field c) Magnetic field d) electrostatic force of attraction. [1] Question While transferring 3C of charge through a wire, 20 J is needed. Find the potential difference across the wire. 2. How is the resistance of a wire affected if its a) length is doubled b) radius is doubled c) temperature is increased. [3] 3. Mention any two properties of a bar magnet. 4. Will the magnetic field lines ever intersect? Explain. 5. Is it possible to isolate the poles of a magnet? 21

22 Physics Paper 8 Section I (40 Marks) (Answer all the Questions) Question 1 1. A person travels from Bangalore to Goa in a car for a distance of 600 km and then he returns to Bangalore in two days. a) what is the total distance travelled by him? b) what is the displacement after the whole journey? 2. Define uniform acceleration. Give its unit. 3. A cricketer throws a ball vertically upwards and collects the ball after t s. a) what is the time taken to reach the highest point. b) what is its velocity at that point? 4. From the displacement - time graph given below, find a) the total distance travelled by the body. b) its velocity while reaching point A. c) its acceleration. d) its retardation. [4] 50 A Displacement( m) B Time(s) Question 2 1. Find the order of magnitude of the following: a) s b) 1.2 x m. 2. A microscope is provided with a main scale graduated with 20 divisions in 1 cm and a vernier scale with 25 divisions on it coinciding with 24 divisions of main scale. What is the least count of the microscope? 3. While measuring the volume of a coin, water is taken in a measuring jar to a level 20.0ml. When a coin is immersed in it the water level rises to 24.2 ml. What is the volume of the coin? Express the volume in SI unit. [3] 4. What is a seconds pendulum? [1] 5. The time periods of two simple pendulums at a place are in ratio 2:1. What will be corresponding ratio of their lengths? Question 3 1. While verifying ohm s law for a conductor, the data obtained are given below. [4] Plot a graph for V against I. Use the same to find I 1 at V 1 = 0.3V and I 2 at V 2 = 1.1V Find the slope. What is its significance? 22

23 2. A person sitting on a swing stands up. What happens to the period of the swing? Explain. 3. State whether the following quantities are scalar or vectors. a) Momentum b)energy c) mass d) velocity e) work done f) pressure. [3] 4. Express 72 kmh -1 in ms -1. [1] Question 4 1. A rod made of an alloy 1m long when heated through 80 o C increases its length by 1.62mm. Calculate the coefficient of linear expansion for the alloy. 2. What is the equivalence of a) 1J in erg. 2) 1 calorie in J. 3. Name the process of heat transfer in the following cases. a) the hotness of a metallic rod at one end when it is heated at the other end. b) boiling of water. c) heat energy from the sun. [3] 4. The air conditioner in a room is installed near the ceiling. why? 5. What is a green house? [1] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. An object o is kept 100 cm in front of a plane mirror M. If the mirror is moved 50 cm away from the object, how does the image shift from its previous position? 2. State the two laws of reflection of light. 3. How many images are formed in a pair of plane mirror placed. a) Parallel to each other. b) Perpendicular to each other. 4. Show with a help of a ray diagram, the formation of image by an extended object placed between the centre of curvature and the principle focus of a concave mirror. a) Is the image real or virtual? b) Is the image enlarged or diminished? [4] Question 6 1. Give an example for (i) inertia of rest (ii) inertia of motion. 2. A ball of mass 100 g is initially moving with a velocity of 100 ms -1. While applying a constant force on the ball for 5 s, it acquires a velocity of 150 ms -1. Calculate a) the initial momentum of the ball. b) the final momentum of the ball. c) the rate of change of momentum. d) the accleration of the ball. e) the magnitude of the force applied. [5] 3. Give two examples of action and reaction. 23

24 4. What is the weight of a body of mass 10 kg? [1] Question 7 1. Write any two factors affecting the upthrust due to a liquid on a body. 2. A metal cube of side 2 cm and density 8 gcm -3 is suspended by a thread and is completely immersed in a liquid of density 1.0 gcm -3. What is the tension of the thread? [3] 3. Distinguish between density and relative density. 4. What is a hydrometer? Name the principle on which it works and state it. [3] Question 8 1. State whether each one of the following is a mechanical wave or a non-mechanical wave. a) sound waves b) radio waves c) sea waves d) seismic waves. e) micro waves f) heat waves. [3] 2. Mention any two factors that affect the speed of sound in a gas. 3. A wave pulse on a string moves a distance of 10 m in 0.05 second. Calculate a) the velocity of pulse b) the wavelength of the wave on a string if its frequency is 400 Hz. [3] 4. a) What is the audible range of frequency for a human ear? b) Expand SONAR. Question 9 1. Distinguish between free and valence electrons in an atom. 2. Draw a simple atomic model for each of the following: a) Hydrogen atom b) Helium atom. 3. Explain the cause of sparking. 4. What is meant by quantum nature of charge? Explain. 5. What is the effect on divergence of leaves when a positively charged rod is touched with the brass disc of a positively charged gold leaf electroscope? Give reason for your answer. Question Give the symbolic representation of a rheostat. Mention any one of its use. 2. Calculate the number of electrons flowing through a conductor carrying 1 m A current. 3. Name the physical quantities of which units are (i) ampere (ii) coulomb (iii) ohm (iv) volt. 4. Define the following terms. a) Poles of a magnet b) Magnetic axis c) Effective length of a magnet. [3] 5. What is the magnitude of the resultant magnetic field at a neutral point? 24

25 Physics Paper 9 Section I (40 Marks) (Answer all the Questions) Question 1 1. If 1 gms -1 = xns, then what is the value of x? 2. What is the SI unit of a) luminous intensity b) Amount of substance? 3. 1 hour has 60 minutes or 3600 second. Find the order of magnitudes of minutes & second. 4. A vernier callipers has 10 divisions on its vernier scale and on the main scale 1 cm is divided into 10 divisions. While finding the volume of a solid cylinder, the following observations were taken. Find its volume in SI unit. [4] Question 2 1. Give any two examples of vector quantities. 2. When does a concave mirror give a virtual image? Justify your answer with a ray diagram. [3] 3. State Newton s universal law of gravitation. What is the SI unit of universal constant of gravitation? 4. Can Bangalore and Chennai have same value of acceleration due to gravity g? Why? 5. When does water have its maximum density? [1] Question 3 1. What is retardation? What is its unit? 2. Draw position - time graph of two objects moving in the same direction with unequal velocities. 3. A car moves in a semi circular track of radius 1000 m. What is the displacement of the car if it starts from one end and stops at the other end? What is the distance travelled by the car. [3] 4. A ball is thrown vertically up. Draw its velocity - time graph. [1] 5. A ball is released from the top of a tower of height h m. It takes T s to reach ground. What is the position of the ball in T/3 second with respect to the ground? 25

26 Question 4 1. An offshore oil rig is expected to withstand stress at depth. If the depth of the ocean is 5 km, ignoring ocean currents, what is the expected pressure? (Take density of sea water = 1030 kgm -3 ) 2. What is the density of solid block which floats in water of density 1000 kgm -3 with 20% of its volume above water? [3] 3. What is the principle of Hydraulic brakes? [1] 4. Mention the SI unit of upthrust. [1] 5. A wooden raft of mass 50 kg is floating on the surface of water. Density of the raft is 600 kgm -3 and density of water is 1000 kgm -3. What is the maximum amount of water it can displace? [3] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. A scooter of mass 150 kg is moving with a uniform velocity of 80 kmh -1. What is the force required to stop the vehicle in 10 second? [3] 2. Arrange the following natural forces in decreasing order of magnitude. gravitational force, electrostatic force, nuclear force. [1] 3. A bus starts from rest and accelerates uniformly for 10 s to a velocity of 20 ms -1. Then it runs at a constant velocity for 5s & it comes to rest in the next 5s. Draw the velocity - time graph of this motion. Find the distance travelled by the bus in this case. [4] 4. What is the time period of a simple pendulum of length 50 cm? (Take g = 10 ms -2 ) Question 6 1. Mention any two factors that affect barometric height. 2. Why does a fountain pen leak on higher altitudes when it is taken from the ground. 3. Define meta-centre of a floating body. Mention the positions of meta-centre when the body is in a) stable equilibrium b) Unstable equilibrium c) neutral equilibrium. [4] 4. Name any two commercial hydrometer. Question 7 1. Why do we not prefer water as a thermometric liquid? Give two reasons. 2. Convert o C into a) Kelvin b) Fahrenheit scale. [3] 3. A metal cube of side 10 cm at 30 o C increases by 0.2 cm while heating it to 600 o C. Calculate the coefficients of linear, superficial and cubical expansion. [4] 4. What is a thermostat? [1] Question 8 1. What is lateral inversion? Explain with the help of a diagram. 26

27 2. How many images are formed in two plane mirrors held at an angle of 36 o. 3. Mention any ONE use of (i) plane mirror (ii) convex mirror (iii) concave mirror [3] 4. Complete the following ray diagram. Mention any two characteristics of the image. [3] C Question 9 1. Mention any two characteristics of medium which alter the speed of sound. 2. The distance between three consecutive crests of a wave is 90 cm. If the waves are produced at the rate of 240/min, calculate the (i) wave length (ii) time period (iii) wave velocity. 3. What are elastic waves? Give an example? 4. What is the magnitude of electric potential on earth? Why? 5. A charge of 100 C is brought from infinity to given point in an electric field. Find the electric potential at that point if the work done is 5J. Question Draw a neat diagram of Gold leaf electroscope and mention its parts. [3] 2. You are provided with two resistors of resistance 2Ω each. Which combination will you prefer to get the maximum resistance? What is the value of that resistance? 3. What are the three types of magnetic substances? Give an example for each. [3] 4. Define a) isogonic line b)agonic line A B F P 27

28 Physics Paper 10 Section I (40 Marks) (Answer all the Questions) Question 1 1. Express the following CGS units into their respective SI units. a) 100 dyne b) 30 erg. 2. What is the velocity of a) light in kmh -1 (c = 3 x 10 8 ms -1 ) b) sound in kmh -1 (v = 330 ms -1 )[3] 3. Write the following units in the correct form. a) J/kg/k b) 3 milliamps c) 100 mts / sec d) 100 Newton second. 4. a) A vernier callipers has 20 divisions on the main scale in 1 cm. There are 10 divisions of vernier scale coinciding with 9 divisions on the main scale. What is its least count? b) Mention any one use of the upper jaws of the vernier callipers. [1] Question 2 1. a) What is the frequency of a seconds pendulum? b) On a certain planet, a simple pendulum of length 0.5 m takes 20 second for 20 oscillations. What is the planet s acceleration due to gravity? [3] c) What is the magnitude of tension developed in a rope such that the rope is pulled by 1000 N at each end? 2. a) An ice cube floating in a liquid is contained in a beaker. The liquid is completely filled in the beaker up to the brim. What happens when the ice fully melts? b) Why is the dam of water reservoir thick at the bottom? c) What is the approximate frequency range of ultrasound? [1] Question 3 1. Why is wavelength of a radiation preferred as a standard of length? Give two reasons. 2. Does a body moving along a circular path have acceleration? 3. The gas pedal of an automobile is generally called an accelerator. Mention any other control that can be also considered as an acclerator? why? 4. A car changes its speed from 25 ms -1 to 30 ms -1. Meanwhile a bicycle also goes from rest to 5 ms -1. Both take 5s to gain this. Which vehicle undergoes greater accleration? What is the acceleration of each vehicle? [3] 5. What is the significance of accleration - time graph? [1] Question 4 1. a) Name the instrument used for measuring the blood pressure. [1] b) Express the value of 1 atmospheric pressure in SI unit. [1] 2. An auto rickshaw travels at the rate of 30 kmh -1 for 5 minutes, then 60 kmh -1 for 10 minutes and finally at 20 kmph -1 for 3 minutes. Calculate the total distance travelled and average speed of the complete trip. [5] 3. Why is a block of ice always covered with saw dust? Explain. 28

29 4. Define coefficient of cubical expansion. [1] Section B (40 Marks) (Answer Any Four Questions) Question 5 1. What are the strongest and the weakest forces available in nature? 2. a) Why is it hard to walk on a slippery surface? [1] b) What are motions in one dimension, two dimensions and three dimensions? [3] 3. A 0.1 kg bullet acquires a speed of 500 ms -1 in a gun barrel of length 1 m. What is the average force exerted on the bullet? [3] 4. What is the direction of normal reaction of the floor on the body? [1] Question 6 1. Give any two examples of periodic motion. 2. On the surface of the moon, two astronauts cannot hear each other. Why? 3. How long does it take for sound to travel in an iron rail of length 10 km? [Speed of sound in iron is 5280 ms -1 ] 4. Laplace gave a correction to Newton s formula for velocity of sound in air as [3] a) What is γ? b) What is its unit? c) What is its value in air? 5. How does the speed of sound vary with respect to moisture in air? [1] Question 7 1. a) What is global warning? [1] b) What are the effects of global warning (any two)? c) Name any two green house gases? 2. Which mode of heat transfer happens in the following cases? a) Formation of ice on a lake. b) Cooking of rice on a gas stove. 3. What is the boiling point of water on Frarenheit scale? 4. What is the fastest mode of transfer of heat? [1] Question 8 1. Express the image formation in a periscope with a neat diagram. [3] 2. Complete the following ray diagram. Mention any three characteristics of the image. [4] C B A F P 29

30 3. What is rectilinear propagation of light? [1] 4. Distinguish between a real and a virtual image. Question 9 1. Complete the following: d) 1giga pascal... pascal 2. a) What are valence electrons? [1] b) What is a cation? [1] c) Mention the magnitude of the charge of an electron. [1] 3. a) What happens to a negatively charged gold leaf electroscope, when an uncharged metal rod is brought near the brass disc? [1] b) What kind of charge is acquired by an ebonite rod rubbed with fur? [1] 4. Draw the simple atomic model of the lithium atom whose atomic number is three. [1] 5. Draw an electrical circuit diagram consisting of the following components. a) D.C source b)rheostat c) 2 resistance in series d) Volt meter e) plug key f) Ammeter. Question State and define the SI unit of potential difference. 2. A wire of length 2m has a resistance 5Ω. What happens to its resistance if its length is increased to 4 m? 3. Give any two properties of magnetic field lines? 4. Is magnetic field a vector or a scalar? [1] 5. Draw the diagrams of the following: a) Bar magnet. b) Horse shoe magnet. c) Magnetic needle. 30

31 Physics Paper 11 Section I (40 Marks) (Answer all the Questions) Question 1 1. a) Distinguish between a body and a particle. [5] b) (i) Define uniform acceleration. (ii) Draw V - T graph of a particle undergoing uniform acceleration. (iii) What is the significance of the slope of a V-T graph? 2. a) How the value the acceleration due to gravity g change with [5] (i) depth (ii) altitude. b) On a fast driving lane, after sighting the green signal, a driver starts his car and reaches a speed of 100 kmp -1 in 6s. He drives at the same speed for 12s. He spots the following red sign and brings the car to rest in 3s. Draw the velocity - time graph for the above motion? what is the total distance travelled by time? Question 2 1. Mud guards are provided behind the wheels of vehicles. Why? 2. A bullet of mass kg and a shell of mass 500 kg are fired simultaneously and they reach the same target 100 m away in 1.5s and 3s respectively. Find their momentum.[3] 3. What are contact forces? Give any two examples. [3] 4. State whether the following are scalars or vectors. a) Momentum b) Pressure c) energy d) momentum of a force. Question 3 1. What are magnetic lines of forces? State one of their properties. 2. Name any two factors affecting the process of conduction of heat in a metal rod. 3. How does the pressure change when we go from a) ground level to higher altitude? b) Surface of water to the bottom of a swimming pool? 4. Give any two distinctions between luminous and non luminous bodies. 5. Mention any two disadvantages of using alcohol to a thermometric liquid. Question 4 1. Calculate the weight of a body of mass 30 kg in (i) kgf and (ii) newton. 2. What is force of friction? In which direction does it act? 3. Define a) couple b) moment of a couple. 4. Two children of masses 30 kg and 60 kg are sitting on one side of a see-saw at distances 2m and 2.5m respectively from the middle. Where should a man of mass 80 kg sit to balances the see saw? [4] 31