The document is a physics sample question paper for Class XI, designed for a maximum of 70 marks with a duration of 3 hours. It consists of four sections (A, B, C, and D) with a total of 30 questions covering various physics topics, including mechanics, thermodynamics, and wave motion, each having differing marks assigned. There are specific internal choices in some questions, and instructions emphasize the importance of neat diagrams.

1. PHYSICS
SAMPLE QUESTION PAPER
Class:XI Maximum Marks: 70
Time Duration: 3 hrs No of pages: 3
General Instructions:
Ò All questions are compulsory.
Ò This question paper consists of four sections A, B, C and D. Section A contains 8
questions of one mark each, Section B is of 10 questions of two marks each, Section C is
of 9 questions of three marks each and Section D is of 3 questions of five marks each.
Ò There is no overall choice. However, an internal choice has been provided in one
question of 2 marks, one question of 3 marks and two questions of 5 marks weight age. A
student has to attempt only one of the alternatives in such questions.
Ò Whenever necessary. The diagrams should be neat and properly labeled.
SECTION A (1X8 = 8)
1. Define Binding Energy
2. What will be the nature of velocity-time graph for a uniform motion
3. State Newtons second law of motion
4. What is meant by mas energy equivalence?Discuss its significance in Physics
5. How energy make one joule?
6. Why two streamline cannot cross each other
7. Give dimension of solar constant and water equivalent
8. Define mean free path
SECTION B (2X10 = 20)
9. Each side of the cube is measurement to be 7:203m, what are the total surface area and the
volume of the cube
10. A ball is thrown vertically up with a velocity of 20m/s. Construct time- acceleration and time
displacement graph
11. A body of mass 5kg initially at rest is subject to a force 16N. What is the kinetic energy acquired
by the body at the end of 10s
12. A shell explodes while at est. Discuss the momentum and energy conservation in the explosion
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2. 13. In a fly wheel , most of the mass is concentrated at the rim? Explain why?
14. Explain why “A drop of liquid under no external force is always spherical in shape.”
15. Why does a cycle tube burst in summer?
16. What do you understand by triple point
17. What are reversible and irreversible process
18. Define Avogadro's number and give its value.
SECTION C (3X9 = 27)
19. A body covered 12m in 2 second and 20m in 4th
second. Find what distance the body will cover
in 4 second after the 5th
second
20. What is projectile? Show that path followed by an oblique projectile is a parabola
21. Drive a relation for the optimum velocity of negotiating a curve by a body in a banked curve
22. What is an elastic collision? What will happen , when a) A heavy body collides on a light mass at
rest
23. Prove that the rate of change of the angular momentum of particles is equal to the torque acting
on it .
24. Define gravitational potential and gravitational fled intensity. Give their units. Also write the
relation between them.
25. What is the capillary rise? Drive an expression for the height to which a liquid rises in a capillary
tube of radius r.
26. Draw a labeled curves which show how the energy in the black body radiation spectrum varies
with wavelength at various temperature. What results does it lead to
27. what is simple Harmonic Motion? Show that in SHM, accelerations directly proportional to its
displacement at a given instant
SECTION D (5X3 = 15)
28. The ratio of the coefficient of thermal conductivity of two different materials 4:3. If the thermal
resistance of the rods of the same thickness of these materials is the same, ten what is the ratio
of the lengths of these rods?
29. An air bubble of volume 1.0cm3
rises from the bottom of a lake 40m deep at a temperature of
120
c. To what volume does it grow when it reaches the surface, which is at temperature of 350
C?
30. Derive three equations of motion by calculus method . Express condition under which they can
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3. be used.
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