Oscillations and Waves-Doppler Effect in Sound (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 16

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Question number: 1

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

Doppler shift in frequency depends upon

Choices

Choice (4) Response

a.

The velocity of the source

b.

The velocity of the observer

c.

The frequency of the wave produced

d.

All c. , b. and a. are correct

Question number: 2

» Oscillations and Waves » Doppler Effect in Sound

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Question

A whistle giving out 461 Hz approaches a stationary observer at a speed of 44 m/s. The frequency heard by the observer in Hz is

Choices

Choice (4) Response

a.

430 Hz

b.

550 Hz

c.

532 Hz

d.

545 Hz

Question number: 3

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

A source of sound and a listener are moving towards each other with a speed of the speed of sound. If the frequency of the note emitted by the source is f, the frequency of the note heard by the listener will be nearly:

Choices

Choice (4) Response

a.

2.20 f

b.

1.18 f

c.

1.20 f

d.

2.0 f

Question number: 4

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 180 Hz, while both of them move towards a stationary siren of frequency 162 Hz. Calculate the speed of the motorcycle, if it is given that he does not observes any beats

Choices

Choice (4) Response

a.

Zero

b.

22 m/s

c.

33 m/s

d.

28.7 m/s

Question number: 5

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

A whistle sends out 256 waves in a second. If the whistle approaches the observer with velocity 1/3 of the velocity of sound in air, the number of waves per second the observer will receive,

Choices

Choice (4) Response

a.

384

b.

192

c.

300

d.

200

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