Oscillations and Waves (AIIMS (All India Institute of Medical Sciences) Physics): Questions 34 - 38 of 50

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Question number: 34

» Oscillations and Waves » Harmonics

MCQ▾

Question

Two sounds in a gas differ in their loudness level by 40 db. What is the ratio of the amplitude of the pressure oscillations?

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 35

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

MCQ▾

Question

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

Choices

Choice (4) Response

a.

3 times

b.

9 times

c.

36 times

d.

6 times

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Question number: 36

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

In an experiment, on the measurement of , by a simple pendulum, the time period was measured with an accuracy of 0.1 % and the length was measured with an accuracy of . The resultant value of obtained with accuracy . Than find the value of .

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 37

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A vehicle, with a horn of frequency is moving with a velocity of in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency. Then – (Take velocity of sound in air 300 m/s)

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 38

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A siren emitting sound of frequency 750 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.

530 Hz

b.

669 Hz

c.

489 Hz

d.

344 Hz

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