BITSAT Physics: Questions 13 - 18 of 197

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Question number: 13

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Coefficient of performance of an ideal refrigerator working between temperatures T1andT2(T1>T2) is –

Choices

Choice (4) Response

a.

β=T2T1T2

b.

β=T1T1T2

c.

β=T1T1+T2

d.

β=T2T1+T2

Question number: 14

» Wave Optics » Polarization

MCQ▾

Question

If we consider electrons and photons of the same wavelength, then they will have same –

Choices

Choice (4) Response

a.

Velocity

b.

Energy

c.

Momentum

d.

Angular momentum

Question number: 15

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

Question

In an equilateral triangular prism, the angle of minimum derivation for a certain wavelength is 40° . The corresponding angle of incidence is –

Choices

Choice (4) Response

a.

50°

b.

30°

c.

45°

d.

40°

Question number: 16

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

R. M. S. velocity of a particle is v at pressure P. If the pressure increases by two times, then R. M. S. velocity will become –

Choices

Choice (4) Response

a.

4v

b.

2v

c.

0.5v

d.

v

Question number: 17

» Laws of Motion » Laws of Friction

MCQ▾

Question

If the coefficient of friction of a plane inclined at 30° is 0.4 , then acceleration of a body sliding freely on it is (g=9.8ms2)

Choices

Choice (4) Response

a.

2.54ms2

b.

9.8ms2

c.

1.51ms2

d.

4.9ms2

Question number: 18

» Kinematics » Motion in a Plane

MCQ▾

Question

A man is standing on a spring platform. Reading of spring balance is 60kg wt. If man jumps outside from the platform, then reading of spring balance –

Choices

Choice (4) Response

a.

Increase

b.

Remain same

c.

Decrease to zero

d.

Both a. and c. are correct

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