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CLASS XI SAMPLE QUESTION PAPER BY SUJIT SAXENA

                 In this question Paper the syllabus of following units is covered

                                    1.Physical World and Measurement

                                    2.kinematics

                                    3.Laws of motion

                                    4.Work, Energy and Power

Q1. What is full form of SONAR.

Q2. Find the area of circle of radius 3.458 cm up to correct significant figures.

Q3. Can a particle in one dimensional motion with zero speed may have non zero velocity . (1)

Q4. the v-t graph of two object make angle of 30⁰ and 60⁰ with time axis find ratio of their accelerations. (1)

Q5. A bullet fired from a rifle is more dangerous than an air molecule hitting a person through both have same speed why.

Q6. A cricket ball of mass 500g is moving with speed of 36km/h. it is reflected back with same speed what is impulse applied unit.

Q7. A spring is cut into two equal halves what is the spring constant of each potion .

Q8. Write the condition for two vectors to be parallel.

Q9. Write down limitations of dimensional analysis.

Q10. The time period of oscillation is measured . L is about lo cmand is known to immaccuracy time period is about 0.5s the time of oscillation of 100 oscillation is measured with a wrist watch of is resolution . what is accuracy in determination of g.

Q11. Write dimensional formula for (i) frequency (ii) plank constant.

Q12. The ceiling of a long hall is 25m high .what is maximum horizontal distance that a ball thrown with a speed of 40ms^-1 can go without hitting the ceiling of hall.

Q13. A mass m is at rest on a rough surface . Draw the variation of force of friction experienced with the force applied on it.

Q14. If kinetic energy  of a body increase by 300% by what percentage does its momentum increases .

Q15. Write name of commercial unit of electrical energy and convert it in Joules.

Q16. Write statement of work energy theorem and prove it

Q17. What is angular velocity of hour hand of clock.

Q18. The position of a particle is given by r^→ = 3ti-2t² j+4k

(a)    Find velocity of particle (b) velocity v-at t = 2s

Q19. Expalin terms

(a)    Principle of Homogenity (b) Absolute Error (c) Relative error

Q20. Centripetal force experienced by body F depends on mass m of body , speed v and radius of body , speed v and radius of circular path r derive relation of body , speed v and radius of circular path r derive relation for f with help of dimensional method.

Q21. Derive three equations of motion by calculus method.

Q22. A player throws a ball upwards with an initial speed of 39.2m/s. (a) what is direction of acceleration during upwards motion (b) find velocity and acceleration of ball at highest point (c) find height through which ball rises up.

Q23. Calculate the area of parallelogram whose adjacent sides are given by vectors  A = i+2j+3k , B = 2i-3j+k

Q24. Write newton’s II^nd  law of motion . prove F= ma ,Define 1 Newton .

Q25. A monkey of  mass  40kg climbs on a rope which can stand a maximum tension of           600 N. in which following cases rope will break . the monkey

(1)   climbs up with an acceleration of 6 ms^-2

(2)   climbs down with acceleration of 4 ms^-2 

(3)   climbs up with uniform speed of 5 ms^-2

Q26. What do you  mean by conservative forces prove that gravitational force is conservative force.

Q27. Write law of parallelogram of vector addition derive relation for resultant vector.

Q28. Write conditions for perfectly elastic collision. Derive an expression for velocity of two masses m₁ and m₂ moving with velocities u₁ and u₂ undergoing elastic collision one dimension

Q29. Prove that path of projectile is parabolic derive relation for maximum height, time of flight and Horizontal range .

OR

Derive an expression for time period of conical pendulum

Q30. Write basic laws of friction . prove that angle of friction = Angle of Repose

         suggest methods for reducing friction .