PHYSICS(Theory)
CLASS:XI
Time:2
Hrs
M.M :50
General
Instruction:
1. All questions are
compulsory.
2. There are 15 questions in
total. Question 1 and 4 carry 2 marks each. Question 5 to 13 carry 3 marks each
and question 14 to 16 carry 5 marks each.
3.There is no overall choice in
paper , however some internal choices are mentioned in the paper.
1. Define effective length
for a simple pendulum. If we increase the mass of bob of a pendulum ,what is the effect on its time
period.
2. At what height above earth
surface its acceleration due to gravity becomes half of the value at the
surface of earth.
3. Find the scalar product
between vectors A=3i - 2j + 4k and B = 2i - 4j + 3k.
4. Two bodies A and B having
masses 5 kg and 6 kg respectively, have there equal Kinetic energies. Find ratio of their momentum.
5. A machine has a mass of
30kg. It fires 40gm bullets at the rate of 5 bullets per second , with the speed of 330 m sec-1.what
force must be applied to the gun to keep it in position ?
6. State Newton’s third law
of motion with one example
7. Explain First law of
thermodynamics with its equation.
8. Explain kepler’s law of
planetary motion.
9. State
and prove work energy theorem.
10.. Explain types of friction with its graph.
11. State Newton’s
second law of motion on its basis derived the relation between force and
acceleration.
12. Prove the relation Cp – Cv = R in
thermodynamics.
13. What do you mean by
bending of cyclist and derive the expression for the angle of bending.
14. Define
SHM with its characterstic properties.
OR
Show
the motion of a simple pendulum follows S.H.M with its derivation.
15. Rakesh with the intention
to win in the interschool sports practiced high jump every day for about a month.
He participated and won 1st position in the interschool sports. (a)
Comment upon the values Rakesh possesses. (b) Why does an athlete run some
steps before taking a jump? (Value Based
Question)
16. State and prove
Bernoulli’s theorem with its one application.
OR
Derive the expression for height of a liquid in a capillary tube.
Er. Shyam Pachori
Classes At C.L 81 D.D Nagar Gwalior
Mobile:9039803981
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