CLASS XI WINTER BREAK HOLIDAY HOMEWORK-2014 SUBJECT COMPUTER SCIENCE

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1 CLASS XI WINTER BREAK HOLIDAY HOMEWORK-2014 SUBJECT COMPUTER SCIENCE Complete the following in your theory copy in Class Work Section, if no space exist in class work section then you can do it in Home Work Section. Q1. Complete notes on Chapter Library Functions, Functions and Array. Important Points to be covered in each chapter User Defined Functions: 1. Definition of function 2. Need and advantages of using functions 3. Function Prototype definition and syntax of declaration 4. Difference -Actual and Formal Parameters or Arguments 5. Function s Calling and example of it 6. Call by Value and Call by Reference Explanation with example 7. Difference- Local and Global Variable 8. Difference-Default argument and Constant Argument Complete the following in your theory copy in Home Work Section. 1. WAP sum of the following series ( ) + ( ) + n terms (Here n is entered by user.) 2. Revise Ch 1 to 11 and solve ANY 5 unsolved problems on each topic from ch-11 in H.W. Section on Built in Functions and User-defined functions. 3. Solve Half Yearly Paper in Homework Notebook. 4. Project Work for Session Ending:- Do the case study of the project of your given topic: Please upload this PPT before 12/01/2015 (Monday) in the facebook group KVAFSGGNXI and fill the form given in link You can do any one of these: PPT WEBSITE MOVIE A Journey FROM Machine Language TO Fifth Generation Languages. It should include the following Updates taking place in: 1. Hardware Changes & requirements. 2. Software Changes 3. Operating System 4. Generations of computers & Languages 5. People Behind these updates. Submit the Homework by 12/01/2015 (Monday) and do Homework in Your Homework notebook. -By Ashu Aneja

2 Winter Break Home Assignment XI Economics Prepare fire questions from each topic of OTBA. Prepare the project on consumer awareness as per allocated topic. Learn all the formulas and practice of numerical (Dispersion and Correlation) Practice of MCQ unit wise (Part A and Part B) Class XI Revision work 1) Fundamentals of Physical Geography India: Physical Environment CLASSS- XI SUBJECT- ENGLISH Read the novel The Canterville Ghost and answer the following questions: Q. 1. It was the ghost who was haunted by the American family. Explain the statement indicating instances from the novel. Q. 2. The Canterville Ghost presents more instances of belied expectations and terrors than that of frightening incidents usually incorporated in ghost novels. Discuss. Q. 3. Describe the character of Virginia in the novel. Q. 4. The activities of the ghost are at the same time horrifying and amusing. Support the statement with help from relevant instances from the novel.

3 Q. 5. State your views on Duke of Cheshire and Virginia s relationship in the novel. Q. 6. Why did the American Republican Minister, Mr. Otis purchase the Canterville Chase despite knowing it to be haunted? Q. 7. Mention the plans made by the ghost to frighten the Otis family. Q. 8. Write a detailed note on the tricks played by the twin on the ghost. Q. 9. If given an option, which part of the novel would you like to change or modify and why? Q. 10. Explain the role played by supernatural elements apart from the ghost in the novel. Q. 11. The ghost and Mr. Otis s family presented a cultural clash between English and the United States. Explain. Q. 12. How did the ghost help Virginia to see the significance of life and death, and why love is stranger than both? Winter-Break Holiday HomeWork Session-> Maths Class-XI PPT s on Conic Section, 3-D geometry & Limilts and Derivatives Sub Physics Class XI Time : 3 hours M.M:70 General Instructions a) All questions are compulsory. b) There are 30 questions in total. Questions 1 to 8 are very short answer type questions and carry one mark each.

4 c) Questions 9 to 18 carry two marks each, questions 19 to 27 carry three marks each and questions 28 to 30 carry five marks each. d) Use of calculators is not permitted. However, you may use log tables if necessary. e) You may use the following values of physical constants wherever necessary. C = 3 x 10 8 m/s h = 6.63 x Js e = 1.6 x C μ ο = 4π x 10-7 TmA -1 k B =1.38x10-23 JK -1 N A =6.023x10 23 /mole 1. What is the angle between (A + B) and (A X B)? 2. A tennis ball of mass m strikes the massive wall with velocity v and traces the same path. Calculate the change in momentum What is the angle of friction between two surface in contact if the coefficient of friction is 1/ 3? 1 4. Suppose a cyclist is negotiating a curve of radius r with speed v.write the conditions under which skidding will occur Two vectors A and B are directed along y-axis and z-axis respectively. What is direction of vector (B X A)? 6. What is the time period of a simple pendulum at the centre of earth? 1 7. Name the Indian physicist, who was first awarded the Noble Prize Why does the weight of a body become zero at the centre of the earth? 1 9. On a certain day, rain was falling vertically with a speed of 35 m/s.a wind started blowing after sometime with a speed of 12m/s in east to west direction.in which direction should a girl waiting at a bus stop hold her umbrella? A horse has to apply more force to start a cart then to keep it moving.why? The linear momentum is increased by 10%.What is the percent change in kinetic energy? The driver of a truck travelling with a velocity v suddenly notices a brick wall in front of him at a distance d. Is it better for him to apply brakes or to make a circular turn without applying brakes in order to just avoid crashing into wall? Explain A ball falls under gravity from a height of 10m with an initial velocity u.it collides with the ground, loses 50% of its energy in collision and then rises back to the same height. Find the initial velocity u (i)define radius of gyration. (ii)how does a ballet dancer vary her angular speed by outstretching her arms and legs A physical quantity X is given by X=a 2 b 3 /cd 1/2.If the percentage error of measurement in a,b,c and d are 4%, 2%, 3% and 1% respectively, then calculate the %age error in X State perpendicular and parallel axis theorem Write the dimensional formula of the following (i) moment of inertia (ii)gravitational constant 1+1

5 18. Why do we prefer to use a wrench of longer arm? State and prove work energy theorem Determine a unit vector perpendicular to both A=2i+j+k and B=i-j+2k Find centre of mass of a uniform L shaped lamina as shown in fig. The mass of Lamina is3 kg 2m C3 1m 2m C1 C2 Page 1 of 2 22 Show that Newton s second law is the real law of motion. 3 23Obtain an expression for the maximum speed with which a vehicle can safely negotiate a curved road banked at an angle. The coefficient of friction between wheel and road is µ Show that the total mechanical energy of a body falling freely under gravity is conserved 25. What is the acceleration of the block and the trolley system shown in figure if the coefficient of kinetic friction between the trolley and surface is 0.04?What is the tension in spring? Neglect the mass of spring. 3

6 . 26.The displacement (in metre) of a particle moving along x-axis is given by x=18t + 5t 2 Calculate: (i) the instantaneous velocity at t=2s (ii) average velocity between t=2s and t=3s (iii) instantaneous acceleration Discuss the variation of acceleration due to gravity with height from the earth surface (i) State parallelogram law of vector addition. Find the magnitude and direction of the resultant of two vectors P and Q inclined at angle ø with each other. (ii) Derive an expression for the centripetal acceleration of a body moving with uniform speed v along a circular path of radius r (i)What is projectile? Prove that the path followed by a projectile is parabolic in nature. (ii) A projectile is fired with a velocity u making an angle ø with the horizontal. Derive an expression for its a) time of flight ii) maximum height and iii)horizontal range Define escape velocity. Derive an expression for the escape velocity of an object from the surface of earth. OR. Define orbital velocity. Derive an expression for the orbital velocity of a satellite. Page 3 xi phy hly

7 25. What is the acceleration of the block and the trolley system shown in figure if the coefficient of kinetic friction between the trolley and surface is 0.04?What is the tension in spring? Neglect the mass of spring The displacement (in metre) of a particle moving along x-axis is given by x=18t + 5t 2 Calculate: (i) the instantaneous velocity at t=2s (ii) average velocity between t=2s and t=3s (iii) instantaneous acceleration Discuss the variation of acceleration due to gravity with height from the earth surface (i) State parallelogram law of vector addition. Find the magnitude and direction of the resultant of two vectors P and Q inclined at angle ø with each other. (ii) Derive an expression for the centripetal acceleration of a body moving with uniform speed v along a circular path of radius r 3+2 OR (i) Calculate the angular speed of (a) the hour hand of a watch and (b) the earth about its own axis. (ii) State laws of limiting friction (i)What is projectile? Prove that the path followed by a projectile is parabolic in nature. (ii) A projectile is fired with a velocity u making an angle ø with the horizontal. Derive an expression for its a) time of flight ii) maximum height and iii)horizontal range. 2+3 OR (i).discuss stess-strain curve for a loaded steal wire 3 (ii) What are ductile and brittle materials? Give one example each Define escape velocity. Derive an expression for the escape velocity of an object from the surface of earth. OR. Define orbital velocity. Derive an expression for the orbital velocity of a satellite. 5

8 Page 3 of 3 Hindi 1. अर द ध-व ष क ऩर क प रश न ऩत र हऱ करन. 2. सभ ऩ ठ और कषवय - ऱ खक क स च त य र करन. 3. उऩय क त प रश न ऩत र म द ए ननबन ध व ऩत र(२) करन ह 4. ऩररय जन क यध :- सऩ क य, आऱ ख, ररऩ ट

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12 Please check total printed pages before start:- 6 Roll No"' nnn HALF YEARLY EXAMINATION. 2A SUBJECT. PHYSIGS CLASS. XI A-r 'Time : 3 Hrs. 15 Minutes M"M. 7A Write down the dimensional formula of Planck Constant. 1 Name a Scatar & a Vector quantity which have the same dimensions. 1 Displacement is given by x = t2. Find the value of instantaneous acceleration at t - 2 sec Can a rectangular component of a vecter be greater than the vector itself. 1 Define the angle of Contact 1 Water rises in a Capillary whereas the mercury falls in the same tube. Explain? 1 7. Why the blood pressure in humans is greater at the feet than at the brain? 1 B. A Cricket ball is hit at 450 to the horizontal with the energy Energy E^ Calculate the Kinetic energy at the point of the motion. Kinetic highest lp.r.o"l

13 A-r A physica! quantity P is related to four observables a,b,c and d as follows 't P = &"b" l"!cd The Fercentage erro!'s of measurements in a,b,c,d ate "1o/o, 3"/n, 4% and 27o respectiveiy. What is the percentage error in quantity P? A car moving along a straight highway wlth a speed of 126 Kmih is brought to a stop within a distance of 200m. What is the retarclation of Car and how long does it take to stop? lf the earth's be at one half its present distance f rom the sun how many day wili their be in a year. Define Unifornn Velocity of an object moving along a straight line. What will be shape of Velocity time graph of such a motion? 2 13" A body constrained tc E'nove alone the Z axis of a Coordinate system is subjected to a Ccnstant force F --f +2j +skn What is the Work done by this force in moving the body a distance of 4m along the Z axis. 14. A nentron having the mass of 1.67 X1A" Kg and moving at 10 8rn/sec collices with a deutron at rest and sticks to it. Given that the mass of deutron is 9"34X10'' Kg. Calculate tp.r"o.l

14 A the speed of the Combination. Composite particle is called triton. 15. A rope is wound round a hcllow Cylinder of mass 3Kg and l.adius of 40cm. What is the angular acceleration of the cylinder', lt the rope is pulled with a force of g0n? what is the linear acceleration? " Find the value of g at a height of 400Km above the surface of earth. Given, radius of earth R = 6400Km and value of g at the surface of earth = g.8m/sec2. State Pascal's law? Write the two application of pascal's law. 18. why is it dangerous to stand on the edge of the platform near the line when the train is passing by? 19. what do you mean by parallax. How do we use this method for determining the distance of nearby star. 1+2=3 20. Assumlng that the frequency t) of a vibrating string depends upon the load(f) applied, tength of the string(t) and mass per unit length m. Hence deduce the formula for the frequency of the string A woman starts from her horne at g.00am, walks with the speed of 5Km/h on a straight road up to her office 2.sKm away. Stays at the office up to b.00pm and returns home by an auto with a speed of 25 Km/h. Choose suitable scales and plot the x-t graph for her motlon. 3 lp.r.o.l

15 A-I Prove that the sum of Kinetic and potentiar energy of the block tied with a spring remain constant. Also show it with the help of diagram. Z+ 1 =O 23. (i) Explain the bending of cyctist white goine atong a curved road. (ii) A cyclist riding at a speed of 14"6 takes a turn around a circular road of radius z}^hm. what is the angle of inclination to the Vertical? 24. state & prove the theorern of parailel axes. 25. state Hook's law" Discuss the stress vs strain metallic wire, when stretched upto the breaking 1 +2=3 graph for point. 1 +2=3 26. Four bodies have been arranged at the Vertices of the rectangle having the sides 2m & 1m in the coordinate system. Find the centre of mass of the systern. 3 lp.r.o.l

16 A OR The angulan speed of a motor wheel is increased from 1200rpm to 3120 rpm in 16 seconds (i) What is aneular acceleration (ii) assumine the acceleration to be uniform, how many revolution does it make during this time. 1Yz+1Yz=3 27. What do you mean through a hose pipe speed of 1.Omlsec. nozzle" lt the water by equation of Continuity? Water flows whose internal diameter is 0.2cm at a What should be the diameter of the is to ernerge at a speed of 4.Om/sec. 1 +2=3 28. what do you mean by Projectile? A projectile is thrown at an angle of 0 with horizontal Prove (i) y - x tand- gx' 2u' cas' 0 (i ;) R_ p'sin20 1+2Yz + 1y2 = 5 g OR Discuss the motion of a the Velocity of an object Verticle circle. particle in Vertical plane. Calculate at the peak and the bottom of the 1+2+2=E 29. Write down the condition for a Satellite to be stationary. lp.r.o.i

17 l- A Deduce the height of orbit of geostationary Satellite above * the su rface of earth. OR what do you mean by escape Velocity of an object? prove that the velocity of escape of a body from the surface of earth is "12 times the velocity for a circular orbit just above the earth's surface. 30. State and Prove Bernoullis theorem. OR Define terminal velocity, Show that terminal Velocity v of a sphere of radius r, density p, falling vertically through a viscous fluid of density o and Coefficient of viscosity ry is given by l/--" 2(p-o) 'ftg, 9rrs **********