AIIMS (All India Institute of Medical Sciences) Physics: Questions 168 - 172 of 500

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Question number: 168

» Oscillations and Waves » Doppler Effect in Sound

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Appeared in Year: 1999

MCQ▾

Question

A siren emitting sound of frequency 500 Hz is going away form a static listener with a speed of . The frequency of sound to be heard directly from the siren is –

Choices

Choice (4)Response

a.

256.5 Hz

b.

589.3 Hz

c.

434.2 Hz

d.

484.2 Hz

Question number: 169

» Wave Optics » Interference

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Appeared in Year: 2002

MCQ▾

Question

What is the path difference for destructive interference?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 170

» Thermodynamics » Thermal Equilibrium

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Appeared in Year: 2006

MCQ▾

Question

Two balloons are filled, one with pure He gas and the other by air, respectively. If the pressure and temperature of these balloons are same then the number of molecules per unit volume is –

[AIIMS, UPCPMT 06]

Choices

Choice (4)Response

a.

same in both balloons

b.

more in air filled balloon

c.

in the ratio of 1: 4

d.

more in the He filled balloon

Question number: 171

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

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Appeared in Year: 1999

MCQ▾

Question

If vibrations of a string are to be increased to a factor of two, then tension in the string must be made –

Choices

Choice (4)Response

a.

thrice

b.

Four times

c.

Half

d.

Eight times

Question number: 172

» Oscillations and Waves » Speed of a Wave

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Appeared in Year: 2002

MCQ▾

Question

The velocities of sound at the same pressure in two monatomic gases of densities and are and respectively. If , then the value of is?

Choices

Choice (4)Response

a.

b.

c.

4

d.

2

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