CBSE Class 11 Physics Quiz | CBSE Class 11 Physics Multiple Choice Questions(MCQs) & Answers

1 A conservative force is dependent only on :
A Position of the objects
B Position of the forces
C Position of the path taken
D None of the above

Answer: Position of the objects
2 If any external conservative force also is applied on the distributed loading then?
A The net force will act at the centroid of the structure only
B The net load will not be formed as all the forces will be canceled
C The net force will act on the base of the loading horizontally
D The net force will not be considered, there would be a net force of the distribution, rest will be the external forces

Answer: The net force will not be considered, there would be a net force of the distribution, rest will be the external forces
3 What does Newton’s third law states for the conservative forces?
A The rate of change of momentum is equal to the force applied
B For every reaction, there is an opposite reaction
C The body tends to be rotated if the force is applied tangentially
D The body is rest until a force is applied

Answer: For every reaction, there is an opposite reaction
4 The conservative frictional force always acts ____________ to the surface of the application of the friction.
A Tangential
B Parallel
C Perpendicular
D Normal

Answer: Tangential
5 For equilibrium, the net moment acting on the body by various conservative forces is _____:
A Zero
B Three
C One
D Two

Answer: Zero
6 Which of the following types of force can do no work on the particle on which it acts?
A Centripetal force
B Elastic force
C Gravitational force
D Frictional force

Answer: Centripetal force
7 When a force is parallel to the direction of motion of the body, then work done on the body is.
A maximum
B infinity
C zero
D minimum

Answer: maximum
8 A field in which the work is done in a moving body along a closed path is zero is called.
A Conservative field
B Electromagnetic field
C Electric field
D None of the above

Answer: Conservative field
9 The force that is not one of the conservative forces is
A elastic spring force
B gravitational force
C frictional force
D electric force

Answer: frictional force
10 What exactly is a conservative force conserving?
A Energy
B Acceleration
C Force
D Velocity

Answer: Energy
11 There are 20 divisions in 4 cm of the main scale. The vernier scale has 10 divisions. The least count of the instrument is
A 0.005 cm
B 5.0 cm
C 0.5 cm
D 0.05 cm

Answer: 0.005 cm
12 Electron volt is a unit of
A Energy
B Magnetic Force
C Potential difference
D Charge

Answer: Energy
13 The equation of state of some gases can be expressed as Vander wal equation i.e. (P + a/v2)(V - b) = RT Where P is the pressure, V is the volume, T is the absolute temperature and a, b, R are constants. The dimensions of ‘a’ are:
A [M1L1T-1]
B [M1L-5T1]
C [M2L5T-1]
D [M1L5T-2]

Answer: [M1L5T-2]
14 Which of the following pairs has the same dimensions?
A Moment of Inertia and Torque
B Specific Heat and Latent Heat
C Surface Tension and Force
D Impulse and Momentum

Answer: Impulse and Momentum
15 One watt hour contains how many joules?
A 3.6 ✕ 103 J
B 10-3 J
C 3.6 ✕ 102 J
D 3.6 ✕ 108 J

Answer: 3.6 ✕ 103 J
16 At 4° C, the density of water is equal to
A 103 kg m-3
B 10 kg m-3
C 10-3 kg m-3
D 10-2 kg m-3

Answer: 103 kg m-3
17 The dimensions of Kinetic energy is same as that of
A Work
B Momentum
C Force
D Pressure

Answer: Work
18 The surface tension of a liquid is 70 dyne/cm. In MKS system its value is?
A 7 ✕ 103 N/m
B 70 N/m
C 7 ✕ 10-2 N/m
D 7 ✕ 102 N/m

Answer: 7 ✕ 10-2 N/m
19 The dimensional formula for Planck's constant is
A [ML2T-1]
B [M2L2T-1]
D [ML1T-1]

Answer: [ML2T-1]
20 Light year is a unit of
A distance
B mass
C sunlight intensity
D time

Answer: distance