Term I Exam Revision Test Paper 3 Class XI Subject Physics
Time 1.5 hr Multiple Choice Questions Dated: 06.12.2021 MM 35
Instructions: 1.Question paper has 35 multiple choice questions carrying 1 mark each.
2. Each question is compulsory.
NOTE: 1. Question paper has 35 multiple choice questions. 2. Each question is compulsory.
Multiple Choice Questions:
1. The dimensional formula of impulse is same as the dimensional formula for:
- (a) Momentum
- (b) force
- (c) rate of change of momentum
- (d) torque
2. Candela is the unit of :
- (a) Electric intensity
- (b) luminous intensity
- (c) sound intensity
- (d) none of these
3. What does slope of positon-time graph represent for a uniform motion?
- (a) Distance
- (b) Displacement
- (c) uniform velocity
- (d) time
4. An object is in uniform motion along a straight line if it:
- (a) Moves equal distances in equal intervals of time
- (b) Does not move
- (c) Moves equal distances in unequal intervals of time
- (d) Moves unequal distances in unequal intervals of time
5. Which of the following quantities is a vector quantity?
- (a) Temperature
- (b) heat
- (c) force
- (d) work done
6. Which of the following quantities remains constant in a projectile motion?
- (a)Speed of body
- (b) acceleration acting on the body
- (c) vertical component of velocity
- (d) linear momentum of body
7. Newton’s third law of motion explains the two forces namely ‘action’ and ‘reaction’ coming into action when the two bodies are in contact with each other. These two forces:
- (a) Always act on the same body
- (b) Always act on the different bodies in opposite directions
- (c) Have same magnitude and direction
- (d) Acts on either body at normal to each other
8. The rate of change of momentum is equal to the applied force and it takes place in the direction of the force is a statement of :
- (a) Impulse-Momentum equation
- (b) Continuity equation
- (c) Pascal’s equation
- (d) Darcy’s equation
9. One joule work is said to be done when
- (a) a force of 1 N displaces a body by 1 cm
- (b) a force of 1 N displaces a body by 1 m
- (c) a force of 1dyn displaces a body by 1m
- (d) a force of 1dyn displaces a body by 1cm.
10. A soldier makes a swing jump between two points, by holding one end of a rope, other end of which is tied to some higher point. Work done by rope in jumping of soldier from one point to another is an example of:
- (a) Negative work
- (b) Positive work
- (c) Zero work done
- (d) None of the above
11. During inelastic collision between two bodies, which of the following quantities always remain conserved?
- (a) Total kinetic energy.
- (b) Total mechanical energy.
- (c) Total linear momentum.
- (d) Speed of each body
12. Which of the following is the product of moment of inertia and angular velocity?
- (a) angular momentum
- (b) power
- (c) torque
- (d) work
13. Which is also known as moment of couple?
- (a) Angular momentum
- (b) torque
- (c) force
- (d) impulse
14. The number of significant figures in the measured value 0.0204 is
- (a) 5
- (b) 3
- (c) 4
- (d) 23
15. A length 5.997 m rounded off to three significant figures is written as
- (a) 6.00 m
- (b) 5.99 m
- (c) 5.95 m
- (d) 5.90 m
16. A man starts from his home with a speed of 4 km/h on a straight road up to his office 5 km away and returns to home, then the path length covered is:
- (a) -5 km
- (b) 5 km
- (c) 0
- (d) 10 km
17. After completing one trip on a roller coaster, the roller coaster’s _________ is zero.
- (a) Displacement
- (b) reference point
- (c) length
- (d) distance
18. In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal?
- (i) If the car is moving on a straight road
- (ii) If the car is moving in circular path
- (iii) The pendulum is moving to and fro
- (iv) The earth is moving around the sun
(a) only (i) and (iv)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) only (i)
19. For a uniformly accelerated motion, V² – V₀²=
- (a) 𝑎⃗ ( 𝑟⃗ - 𝑟₀)²
- (b) 𝑎⃗ ( 𝑟⃗ - 𝑟₀)
- (c) 2 𝑎⃗ ( 𝑟⃗ - 𝑟₀)
- (d) 2𝑎⃗ ( 𝑟⃗ + 𝑟₀)
20. Which one of the following statement is incorrect:
- (a)Frictional force oppose the relative motion.
- (b)Limiting value of static friction is directly proportional to normal reaction.
- (c) Rolling friction is smaller than sliding friction
- (d)Coefficient of sliding friction has dimensions of length
21. Passengers sitting in a stationary car experience a jerk when the car suddenly starts. This is due to _____
- (a) Inertia of motion
- (b) Inertia of rest
- (c) Inertia of turning
- (d) Inertia of acceleration
22. Which of the following is equal with Newton-meter?
- (a) Joule
- (b) Horse Power
- (c) Watt
- (d) Pascal
23. As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?
- (a) Both the potential energy and kinetic energy decrease
- (b) The potential energy decreases while the kinetic energy increases
- (c) The kinetic energy decreases while the potential energy increases
- (d) Both the potential energy and kinetic energy increase
24. A truck and car are moving with same Kinetic energies on a straight road. Their engines are simultaneously switched off .Which one will stop at a lesser distance
- (a) Truck
- (b) Car
- (c) Both will stop at the same distance
- (d) Cannot say with the given data
25. If I , α and τ are the moment of inertia, angular acceleration and torque respectively of a body rotating about any axis with angular velocity ω, then
- (a) τ = I α
- (b) τ = I ω
- (c) I = τ ω
- (d) α = I ω
26. A person is having metals spheres in his hand and is standing on a rotating table if he withdraws his hand to his chest then what will be the effect on the angular velocity?
- (a) remain same
- (b) decreases
- (c) increases
- (d) none of these
27. The angular speed of a minute hand of watch is
- (a) 3600 rad/sec
- (b) 60 rad/sec
- (c) 2π/3600 rad/sec
- (d) none of these
28. Moment of inertia of a body A is IA and that of body B is IB. If angular momentum of both the bodies is equal then (given : IA > IB)
- (a) KE of A = KE of B
- (b) KE of A > KE of B
- (c) KE of A < KE of B
- (d) kinetic energies can’t be compared by a given set of data
29. The temperatures of two bodies measured by a thermometer are t₁=200C ± 0.50C and t₂=500C ± 0.50C. The temperature difference t = t₂-t₁ between them is given by
- (a)t=300C ± 0.50C
- (b) t=700C ± 0.50C
- (c) t=700C ± 1.00C
- (d) t=300C ± 1.00C
30. Mary bought a tank whose dimensions are 5.6 cm, 8.2 cm and 12.8 cm. The volume of water (in cm³) that can be stored in tank (correct upto 4 significant figures) is:
- (a) 585.8
- (b) 600.8
- (c) 590.8
- (d) 587.8
31. A hot air balloon is at rest at a height of 1960m. A ball is dropped from the balloon; determine the time taken by the ball to reach the ground. (take g = 9.8 ms⁻²)
- (a) 10 s
- (b) 20 s
- (c) 12 s
- (d) 25 s
32. The angle made by vector 𝐴⃗ = 2𝑖̂+ 𝑗̂ with x axis is
- (a) tan 𝜃=0.5
- (b) tan 𝜃=2
- (c) tan 𝜃=√5
- (d) tan 𝜃=√25
33. A rocket with a lift-off mass 3.5 x 104 kg is blasted upwards with an initial acceleration of 10m/s². Then, the initial thrust of the blast is (take g = 10 ms⁻²)
- (a) 3.5 x 10⁵ N
- (b) 7.0 x 10⁵ N
- (c) 14 x 10⁵ N
- (d) 1.75 x 10⁵ N
34. A body is whirled in a horizontal circle of diameter 12m. It has angular velocity of 45 rad/s. What is its linear velocity at any point on the circular path?
- (a) 300m/s
- (b) 370m/s
- (c) 270m/s
- (d) 430m/s
35. An athlete in the Olympic Games cover a distance of 100m in 10s. His kinetic energy can be estimated to be in the range
- (a) 2,00,000 to 5,00,000 J
- (b) 20,000 to 50,000 J
- (c) 2000 to 5000 J
- (d) 200 J to 500 J
