Candidate Name: IGCSE Sample Examination Paper PHYSICS PAPER 3 Extended 1 hour 15 minutes Answer questions on the Question Paper. Answer all questions. The questions in this sample were taken from Camridge IGCSE Physics 0625 Paper 3 1 Q1 June 2006 2 Q3 June 2007 3 Q2 Novemer 2005 4 Q4 June 2007 5 Q5 Novemer 2007 6 Q6 June 2007 7 Q7 June 2005 8 Q8 Novemer 2007 9 Q11 June 2005 10 Q10 Novemer 2007 11 Q11 June 2006
2 1 A us travels from one us stop to the next. The journey has three distinct parts. Stated in order they are uniform acceleration from rest for 8.0 s, uniform speed for 12 s, non-uniform deceleration for 5.0 s. Fig. 1.1 shows only the deceleration of the us. Fig. 1.1 a On Fig. 1.1, complete the graph to show the first two parts of the journey. [3] Calculate the acceleration of the us 4.0 s after leaving the first us stop. c Use the graph to estimate the distance the us travels etween 20 s and 25 s. acceleration 5 d estimated distance 5 On leaving the second us stop, the uniform acceleration of the us is 1.2 m/s 2. The mass of the us and passengers is 4000 kg. Calculate the accelerating force that acts on the us. force 5
3 e The acceleration of the us from the second us stop is less than that from the first us stop. Suggest two reasons for this. 1 2 [Total 11] 2 A student wishes to work out how much power she uses to lift her ody when climing a flight of stairs. Her ody mass is 60 kg and the vertical height of the stairs is 3.0 m. She takes 12 s to walk up the stairs. a Calculate i the work done in raising her ody mass as she clims the stairs, work 5 the output power she develops when raising her ody mass. At the top of the stairs she has gravitational potential energy. power 5 Descrie the energy transformations taking place as she walks ack down the stairs and stops at the ottom. [Total: 6]
4 3 Fig. 3.1 shows apparatus for investigating moments of forces. Fig. 3.1 The uniform metre rule shown in Fig. 3.1 is in equilirium. a Write down two conditions for the metre rule to e in equilirium. condition 1 condition 2 Show that the value of the reading on the spring alance is 8.0 N. c The weight of the uniform metre rule is 1.5 N. Calculate the force exerted y the pivot on the metre rule. magnitude of force 5 direction of force [Total: 6]
5 4 Fig. 4.1 shows a student s attempt to estimate the specific latent heat of fusion of ice y adding ice at 0 8C to water at 20 8C. The water is stirred continuously as ice is slowly added until the temperature of the water is 0 8C and all the added ice has melted. Fig. 4.1 a Three mass readings are taken. A description of the first reading is given. Write down descriptions of the other two. reading 1 the mass of the eaker 1 stirrer 1 thermometer reading 2 reading 3 Write down word equations which the student could use to find i the heat lost y the water as it cools from 20 8C to 0 8C, the heat gained y the melting ice. c The student calculates that the water loses 12 800 J and that the mass of ice melted is 30 g. Calculate a value for the specific latent heat of fusion of ice. specific latent heat of fusion 5
6 d Suggest two reasons why this value is only an approximate value. Reason 1 Reason 2 [Total: 8] 5 Fig. 5.1 shows some apparatus which is to e used to compare the emission of infra-red radiation from four differently painted surfaces. Fig. 5.1 Near the centre of each side is an infra-red detector. The four detectors are identical. A supply of very hot water is availale. a Descrie how you would use this apparatus to compare the infra-red radiation from the four surfaces. [3] Suggest which surface will e the est emitter and which will e the worst emitter. est emitter worst emitter
7 c The infra-red detectors are made from thermocouples soldered to lackened metal plates. These are connected to galvanometers. In the space elow, draw a laelled diagram of a thermocouple. [Total: 6] 6 Fig. 6.1 shows a rectangular glass lock ABCD. Fig. 6.1 a The ray FE is partly reflected and partly refracted at E. i On Fig. 6.1, draw in the approximate path of the refracted ray, within and eyond the lock. Lael the ray refracted ray. On Fig. 6.1, draw in the path of the reflected ray. Lael the ray reflected ray. A second ray, almost parallel to AE, strikes the lock at E and is partly refracted at an angle of refraction of 438. i State an approximate value for the angle of incidence at E. State an approximate value for the critical angle for the light in the glass lock.
8 i Calculate an approximate value for the refractive index of the glass of the lock. refractive index 5 c The speed of the light along ray FE is 3.0 3 10 8 m/s. Calculate the speed of the refracted light in the glass lock. speed 5 [Total: 8] 7 Fig. 7.1 shows the parts of the electromagnetic spectrum. Fig. 7.1 a Name one type of radiation that has i a higher frequency than ultra-violet, a longer wavelength than visile light. Some g-rays emitted from a radioactive source have a speed in air of 3.0 3 10 8 m/s and a wavelength of 1.0 3 10 212 m. Calculate the frequency of the g-rays. frequency 5 c State the approximate speed of infra-red waves in air. [Total: 5]
9 8 Fig. 8.1 shows two electrical circuits. Fig. 8.1 The atteries in circuit 1 and circuit 2 are identical. a Put ticks in the tale elow to descrie the connections of the two resistors P and Q. circuit 1 circuit 2 series parallel The resistors P and Q are used as small electrical heaters. State two advantages of connecting them as shown in circuit 2. advantage 1 advantage 2 c In circuit 1, the ammeter reads 1.2 A when the switch is closed. Calculate the reading of the voltmeter in this circuit. voltmeter reading 5 d The two switches in circuit 2 are closed. Calculate the comined resistance of the two resistors in this circuit. comined resistance 5 e When the switches are closed in circuit 2, ammeter 1 reads 5 A and ammeter 2 reads 2 A. Calculate i the current in resistor P, current 5
10 the power supplied to resistor Q, power 5 i the energy transformed in resistor Q in 300 s. energy 5... [Total: 10] 9 Fig.9.1 shows a flexile wire hanging etween two magnetic poles. The flexile wire is connected to a 12 V d.c. supply that is switched off. a Fig. 9.1 Explain why the wire moves when the supply is switched on. State the direction of the deflection of the wire. c When the wire first moves, energy is changed from one form to another. State these two forms of energy. from to
11 d Fig.9.2 shows the flexile wire made into a rigid rectangular coil and mounted on an axle. Fig. 9.2 i Add to the diagram an arrangement that will allow current to e fed into the coil whilst allowing the coil to turn continuously. Lael the parts you have added. Briefly explain how your arrangement works. [Total: 8] 10 Fig. 10.1 shows an AND gate with two inputs A and B and one output. Fig. 10.1 a State the output when i A is high and B is low, oth A and B are low.
12 An electrical thermometer in a greenhouse gives a low output if the temperature is too low. A humidity sensor in the same greenhouse gives a high output if the humidity in the greenhouse is too high. An alarm sounds when oth the temperature is too low and the humidity is too high. i Complete the diagram elow to show how a NOT gate and an AND gate may e used to provide the required output to the alarm. On your diagram, use either high or low to indicate the level of the inputs and outputs of oth gates when the alarm sounds. [Total: 6] 11 Fig. 11.1 shows a eam of radiation that contains a-particles, -particles and g-rays. The eam enters a very strong magnetic field shown in symol form y N and S poles. Complete the tale elow. Fig. 11.1 radiation a-particles -particles g-rays direction of deflection, if any charge carried y radiation, if any [6] [Total: 6]