NCERT Class 11 Physics Entrance Exams Questions & Answers

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

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

Answer: Energy
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]

Answer: [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

Answer: 3.6 ✕ 103 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

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

Answer: Work
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

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

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

Answer: distance

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