Term I Exam Revision Test Paper 2 Class XI Subject Physics
Time 1.5 hr Multiple Choice Questions Dated: 02.12.2021 MM 35
Instructions: 1.Question paper has 35 multiple choice questions carrying 1 mark each.
2. Each question is compulsory.
MULTIPLE CHOICE QUESTIONS:
1. A unitless quantity
- (a) always has a non-zero dimension
- (b) may have a non-zero dimension.
- (c) never has a non-zero dimension
- (d) none of the above
2. The significant figure in 0.500 is
- (a) 3
- (b) 2
- (c) 1
- (d) 4
3. The distance travelled by an object is directly proportional to the time taken. Its acceleration
- (a) increases
- (b) decreases
- (c) becomes zero
- (d) remains constant
4. The relative velocity of a particle moving with a velocity v w.r.t. itself is
- (a) zero
- (b) –v
- (c) v
- (d) none of the above
5. A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?
Ans: C
6. If a particle executes uniform circular motion, choose the correct statement
- (a) The velocity and speed are constant.
- (b) The acceleration and speed are constant.
- (c) The velocity and acceleration are constant.
- (d) The speed and magnitude of acceleration are constant.
7. A particle just completes motion in a vertical circle of radius r. Its velocity at the highest point is
- (a) √𝑔𝑟
- (b) √2𝑔𝑟
- (c) √5𝑔𝑟
- (d) None of the above
8. If two masses (M & m) are connected on a horizontal plane and a force is applied on the combination, then the tension T depends on
- (a) whether force is applied on M or m
- (b) the force applied on the system
- (c) Can’t be predicted
- (d) None of these
9. The work done by the centripetal force for a body moving in a circular path is
- (a) Negative
- (b) positive
- (c) zero
- (d) constant
10. If the stone is thrown up vertically and return to ground, its potential energy is maximum
- (a) During the upward journey
- (b) At the bottom
- (c) At the maximum height
- (d) During the return journey
11. A body of mass M collides against a wall with a velocity v and retraces its path with the same speed. The change in momentum is (take the initial direction of the velocity as positive)
- (a) 2 MV
- (b) 1 MV
- (c) - 2 MV
- (d) Zero
12. For which of the following does the centre of mass lie outside the body?
- (a) Pen
- (b) Dice
- (c) Rectangular tile
- (d) Bangle
13. Which of the following physical quantity has the dimension of [ML²T⁻³]
- (a) work
- (b) power
- (c) pressure
- (d) impulse
14. In the equation: y=A sin(𝛚t-kx),t and x stand for time and distance respectively. The dimensional formula of ω and k is
- (a)M°L° T⁻¹ , M°L⁻¹ T° ,
- (b)M°L⁻¹ T⁻¹ , M°L⁻¹ T° ,
- (c)M°L° T , M°L° T,
- (d)ML° T⁻¹ , M°L⁻² T°
15. Two objects are projected at angles 30° and 60° respectively with respect to the horizontal direction. The range of two objects are denoted as 𝑅30𝑜 and 𝑅60𝑜 . Choose the correct relation from the following
- (a)𝑅₃₀° = 𝑅₆₀°
- (b) 𝑅₃₀° = 4𝑅₆₀°
- (c)𝑅₃₀° = 𝑅₆₀°/2
- (d) 𝑅₃₀° = 2𝑅₆₀°
16. The displacement of a body from a fixed point at any instant is given by x = 5t²+6t+4, what type of motion the particle under goes?
- (a) with uniform velocity
- (b) with uniformly accelerated motion
- (c) with non-uniformly accelerated motion
- (d) cannot be predicted
17. A man goes to his office from home at the speed of V₁₂ and return next half distance with velocity V₂. The average velocity of the car is
- (a) (V₁+V₂) / 2
- (b) 2 V₁V₂ / (V₁+V₂)
- (c) V₁V₂ / (V₁+V₂)
- (d) √V₁V₂
18. The acceleration of a particle can be found from
- (a) slope of displacement time curve
- (b) area under displacement time curve
- (c) slope of velocity-time curve
- (d) area under velocity-time curve
19. A man has mass M. He stands on a weighing scale in the lift, which is moving upwards with a uniform acceleration of a. What would be the reading on the scale?
- (a) Mg
- (b) M(g+a)
- (c) M(g-a)
- (d) Zero
20. A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is-
- (a) 20 N
- (b) 50 N
- (c) 100 N
- (d) 2 N
21. A chain of length L and mass M is held on a smooth table with its 1/nth part hanging over the edge. The work done in pulling the chain is directly proportional to
- (a) n-3
- (b) √n
- (c) n
- (d) n-2
22.Two masses 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their linear momentum is
- (a) 4 : 1
- (b) 1 : 1
- (c) 1 : 2
- (d) 1 : 6
23. Which of the following is equal with Newton-meter?
- (a) Joule
- (b) Horse Power
- (c) Watt
- (d) Pascal
24.Moment of inertia depends on
- (a) Distribution of particles
- (b) Mass
- (c) Position of axis of rotation
- (d) All of these.
25. If a body is rotating about an axis, passing through its centre of mass then its angular momentum is directed along its
- (a) Radius
- (b) Tangent
- (c) Circumference
- (d) Axis of rotation
26. A particle moves on a circular path with decreasing speed. Choose the correct statement.
- (a) Angular momentum remains constant.
- (b) Acceleration is towards the centre.
- (c) The direction of angular momentum remains constant
- (d) Particle moves on a spiral path with decreasing radius
27. A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same, which one of the following will not be affected?
- (a) Moment of inertia
- (b) Angular momentum
- (c) Angular velocity
- (d) Rotational kinetic energy
28. A dancer on ice spins faster when she folds here arms. This is due to
- (a) Increases in energy and increase in angular momentum
- (b) Decrease in friction at the skates
- (c) Constant angular momentum and increase in kinetic energy
- (d) Increase in energy and decrease in angular momentum
29.In the relation : F=a√𝑥 +b t²where F is force,x is distance and t is time ,the dimensions of a/b is
- (a) ML²T⁻²
- (b) ML²T⁻¹/²
- (c) ML⁻¹T⁻³
- (d) M⁰L⁻¹/²T²
30. An experiment measures quantities a,b,c and X is calculated from the formula: X=ab²/c³.The percentage of measurements in a,b,c are 1%,2%,3% respectively. The percentage error in X is
- (a) 26%
- (b) 28%
- (c) 30%
- (d) 14%
31. If two vectors 2 𝑖̂+ 3𝑗̂+ 𝑘̂and - 4𝑗̂– 6𝑗̂– λ 𝑘̂ are parallel to each other, then value of λ is
- (a) zero
- (b) 2
- (c) 3
- (d) 4
32. A car takes a circular turn of radius 50 cm with a velocity of 36 km/hour. The centripetal acceleration of the car is
- (a) 1 ms⁻²
- (b) 2 ms⁻²
- (c) 3 ms⁻²
- (d) 5 ms⁻²
33. A bullet of mass 25 g moving with a velocity of 200 cm/s is stopped within 5 cm of the target. The average resistance offered by the target is
- (a) 1 N
- (b) 2 N
- (c) 3 N
- (d) 4 N
34.The coefficient of friction between two surfaces is 0.2.The angle of friction is
- (a) sin⁻¹(0.2)
- (b) cos⁻¹(0.2)
- (c) tan⁻¹(0.1)
- (d) cot⁻¹ (5)
35. A gun of mass 1000 kg fires a projectile of mass 1 kg with a horizontal velocity of 100 m/s. The velocity of recoil of the gun in the horizontal direction is
- (a) 5 m/s
- (b) 0.1 m/s
- (c) 15 m/s
- (d) 20 m/s
