CLASS XI PHYSICS EXAMINATION (2026)
Maximum Marks: 70 | Time Allowed: 3 Hours
SECTION A: 1-MARK QUESTIONS (MCQs) (20 Questions | 1 Mark Each)
1. Which of the following is the smallest practical unit of time? (a) Solar Day (b) Lunar Month (c) Shake (d) Leap Year
2. One Light Year distance is equal to: (a) 9.462 x 1015 m (b) 9.462 x 1012 m (c) 9.462 x 1015 cm (d) 9.462 x 1012 km
3. The numerical value of the ratio of displacement to distance is:
(a) Always less than 1 (b) Always equal to 1 (c) Equal to or less than 1 (d) Always more than 1
4. What is the angle between velocity and acceleration at the highest point of an angular projectile?
(a) 0° (b) 45° (c) 90° (d) 180°
5. When a bus suddenly takes a turn, the passengers are thrown outwards because of:
(a) Inertia of direction (b) Inertia of motion (c) Inertia of rest (d) Speed
6. A batsman hits a ball with a force of 5N. The force experienced by the bat is: (a) 5N (b) 10N (c) 15N (d) 20N
7. 1 Joule is equal to how many ergs? (a) 105 (b) 107 (c) 109 (d) 1010
8. If a person walks on a horizontal road with a suitcase in hand, the work done by gravity is:
(a) Positive (b) Negative (c) Zero (d) Maximum
9. The moment of momentum is called: (a) Couple (b) Torque (c) Impulse (d) Angular Momentum
10. The centre of mass of a system of particles depends on:
(a) Only the masses (b) Only the axis (c) Direction of motion (d) The masses and their distribution
11. The weight of an object at the centre of the Earth is: (a) Zero (b) Infinite (c) Same as surface (d) R times weight at surface
12. The value of acceleration due to gravity (g): (a) Is same everywhere (b) Is least at poles (c) Is least at the equator (d) Increases with height
13. The dimensional formula of Stress is the same as that of: (a) Impulse (b) Force (c) Pressure (d) Strain
14. Substances which can be stretched to cause large strains are called: (a) Plastic (b) Elastomers (c) Ductile (d) Brittle
15. Sudden bursting of a bicycle tyre is an example of: (a) Isothermal process (b) Adiabatic process (c) Isobaric process (d) Isochoric process
16. Efficiency of a Carnot engine depends on: (a) Nature of gas (b) Temperature of source only (c) Temperature of sink only (d) Temperatures of both source and sink
17. At absolute zero temperature, which property of a gas becomes zero? (a) Potential energy (b) Molecular motion (c) Mass (d) Density
18. A gas behaves as an ideal gas at: (a) High pressure, low temperature (b) Low pressure, high temperature (c) High pressure, high temperature (d) Low pressure, low temperature
19. If the length of a simple pendulum is quadrupled, its time period becomes: (a) Half (b) Double (c) Four times (d) Unchanged
20. The to and fro motion about mean position is called: (a) Periodic motion (b) Oscillatory motion (c) Circular motion (d) Linear motion
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SECTION B: 2-MARKS QUESTIONS (7 Questions | 2 Marks Each)
21. What are the three main applications of dimensional analysis?
22. State the first law of limiting friction. OR
Calculate the net force acting on a body of mass 10 kg moving with a uniform velocity of 2 ms-1.
23. Define Power. Show that P = F · v.
24. Explain why it is difficult to open a door by pushing or pulling it near the hinge.
25. Explain why a body weighs more at poles and less at equator. OR
Calculate the force of attraction between two balls each of mass 1kg, when their centres are 10 cm apart.
26. Define an Isothermal process. State the conditions for it to occur.
27. Define Simple Harmonic Motion (SHM). OR
A simple pendulum performs 4 oscillations in a second. Find its time period.
SECTION C: 3-MARKS QUESTIONS (7 Questions | 3 Marks Each)
28. Derive the relation v2 - u2 = 2as using velocity-time graph. OR
A player throws a ball upwards with an initial speed of 29.4 ms-2. To what height does it rise?
29. State the law of conservation of linear momentum. Why does a gun recoil after firing?
30. State and prove work-energy theorem. OR
Two masses of 1 g and 4 g move with equal K.E. Calculate the ratio of their momenta.
31. Discuss the variation of acceleration due to gravity (g) with depth (d) below the surface.
32. Which is more elastic, rubber or steel? Explain. OR
A wire stretches by 1mm when a weight of 200N is attached. Find the elastic energy stored.
33. State the postulates of the Kinetic Theory of Gases.
34. Derive the expression for the total energy of a particle executing SHM. OR
The time period of a simple pendulum is 2s. What is its period if the length is quadrupled?
SECTION D: 5-MARKS QUESTIONS (3 Questions | 5 Marks Each)
35. COMPREHENSION TYPE
Read the passage and answer the questions (35.1 to 35.5):
"Angular momentum (L) is the moment of linear momentum, L = Iω. According to the Law of Conservation of Angular Momentum, if the external torque is zero, the total angular momentum remains constant (I1&omega1 = I2&omega2). This is demonstrated by a child standing at the centre of a turntable; if he folds his hands, his moment of inertia reduces and his angular speed increases."
.1. SI unit of angular momentum is: (a) Nm (b) kg m2s-1 (c) kg ms-1 (d) Js
.2. If external torque is zero, then: (a) L is constant (b) L is zero (c) ω is zero (d) I is zero
.3. Analogue of mass in rotational motion is: (a) Torque (b) MI (c) Velocity (d) Force
.4. Relation between τ and L is: (a) τ = dL/dt (b) τ = Iω (c) L = dτ/dt (d) τ = mv
.5. A skater pulls arms in to: (a) increase MI (b) decrease MI (c) stop (d) lose energy
36 . What is a Projectile? Derive expressions for Time of Flight, Maximum Height, and Horizontal Range.OR
Define Centripetal acceleration. Derive ac = v2/r and discuss its direction.
37. State and prove Bernoulli's Theorem for an ideal liquid. OR
Define Terminal Velocity. Derive an expression for it using Stoke's Law.
