AIIMS (All India Institute of Medical Sciences) Physics: Questions 160 - 164 of 500

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Question number: 160

» Dual Nature of Matter and Radiation » Black-Body Radiation

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Appeared in Year: 2003

MCQ▾

Question

A black body, at a temperature of 227°C, radiates heat at a rate of . When its temperature is raised to 727°C, the heat radiated by it in will be closest to –

Choices

Choice (4)Response

a.

40

b.

320

c.

640

d.

160

Question number: 161

» Communication System » Sky and Space Wave Propagation

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Appeared in Year: 2005

MCQ▾

Question

For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere –

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 162

» Oscillations and Waves » Doppler Effect in Sound

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Appeared in Year: 2002

MCQ▾

Question

A siren emitting sound of frequency 800 Hz is going away from a static listener with a speed of . Frequency of sound to be heard by the listener is (Velocity of sound )

Choices

Choice (4)Response

a.

286.5 Hz

b.

644.8 Hz

c.

733.3 Hz

d.

481.2 Hz

Question number: 163

» Oscillations and Waves » Simple Harmonic Motion » Energy

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Appeared in Year: 2001

MCQ▾

Question

A sings with a frequency (n) and B sings with a frequency that of A. If the energy remains the same and the amplitude of A is a, then amplitude of B will be –

Choices

Choice (4)Response

a.

4a

b.

2a

c.

a

d.

8a

Question number: 164

» Kinetic Theory of Gases » Equation of State of a Perfect Gas

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Appeared in Year: 1982

MCQ▾

Question

Two gases of equal molar mass are in thermal equilibrium. If , , and are their respective pressures and volumes, then which relation is true –

Choices

Choice (4)Response

a.

b.

c.

d.

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