NCERT Class 11 Physics Entrance Exams Questions & Answers
NCERT Class 11 Physics
QUESTIONS

# NCERT Class 11 Physics Entrance Exams Questions and Answers

71 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

72 Electron volt is a unit of

A Energy

B Magnetic Force

C Potential difference

D Charge

73 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]

74 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

75 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

76 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

77 The dimensions of Kinetic energy is same as that of

A Work

B Momentum

C Force

D Pressure

78 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

79 The dimensional formula for Planck’s constant is

A [ML2T-1]

B [M2L2T-1]

C [MLT]

D [ML1T-1]

80 Light year is a unit of

A distance

B mass

C sunlight intensity

D time