BITSAT Physics: Questions 91 - 96 of 313

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Question number: 91

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

If luminous-efficiency of a lamp is 2lumenwatt and its luminous-intensity is 42 candela then, power of the lamp is –

Choices

Choice (4) Response

a.

138W

b.

62W

c.

76W

d.

264W

Question number: 92

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

We have a galvanometer of resistance 25Ω wire. It is shunted by a 2.5 wire. The part of total current that flow through the galvanometer is given as –

Choices

Choice (4) Response

a.

IgI=411

b.

IgI=111

c.

IgI=3311

d.

IgI=331.1

Question number: 93

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

The specific heat of a gas in an isothermal process is

Choices

Choice (4) Response

a.

Negative

b.

Zero

c.

Infinite

d.

Remains constant

Question number: 94

» Gravitation » Gravitational Acceleration

MCQ▾

Question

The mass of moon is 7.34×1022kg if the acceleration due to gravity on the moon is 1.4ms2, the radius of the moon is –

(G=6.667×1011Nm2kg2)

Choices

Choice (4) Response

a.

1.86×106m

b.

0.56×104m

c.

1.01×1011m

d.

1.92×106m

Question number: 95

» Wave Optics » Polarization

MCQ▾

Question

Which of the following does not change when light goes from one medium to another?

Choices

Choice (4) Response

a.

Intensity

b.

Speed

c.

Frequency

d.

Wavelength

Question number: 96

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

MCQ▾

Question

The diameter of the objective lenses of a telescope is 0.5m and wave length of light is 6000 . The limit of resolution of this telescope is –

Choices

Choice (4) Response

a.

0.03sec

b.

3.03sec

c.

0.15sec

d.

0.06sec

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