Sounds waves and Motion MCQ question and answer with solution

1

Speed of sound waves is 700ms^-1. How long time will the waves take to travel 7 km?

A) 10 seconds B) 100 seconds C) 50 seconds D) 5 seconds

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Answer & Solution

Answer: Option A

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2

A noise level of 100 decibel would correspond to

A) Just audible sound B) Ordinary conversation C) Sound from a noisy street D) Noise from a machine shop

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Answer & Solution

Answer: Option D

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3

Law of superposition is applicable to only

A) light wave B) sound waves C) transverse waves D) all kinds of waves

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Answer & Solution

Answer: Option D

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4

Sound is heard over longer distances or rainy days because

A) sound travels slowly in moist air B) sound travels faster in moist air C) moist air does not absorb sound D) moist air absorbs sound

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Answer & Solution

Answer: Option B

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5

Beats are the results of

A) diffraction B) destructive interference C) constructive and destructive interference D) superposition of two waves of nearly equal frequency

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Answer & Solution

Answer: Option D

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6

The full form of SONAR is

A) Sonographic Navigation And Radiation B) Sound Navigation And Ranging C) Sonographic Navigation Around Radiation D) Sonographic Navigation and Auto Ranging

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Answer & Solution

Answer: Option B

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7

In which of the following option sound may not be across travel?

A) Water B) Vacuum C) Iron D) Air

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Answer & Solution

Answer: Option B

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8

The speed of sound in different medium at 25°C. Which of the following question regarding this statement is/are correct?
A. The speed of sound in oxygen is 316 m/min.
B. The speed of sound in distilled water is 1498 m/min.

A) Both A and B are correct B) Only A is correct C) Neither A is correct nor B is correct D) Only B is correct

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Answer & Solution

Answer: Option C

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9

Bats detect obstacles in their path by receiving the reflected

A) infrasonic waves B) ultrasonic waves C) radio waves D) microwaves

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Answer & Solution

Answer: Option B

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10

Consider the following statements.
1. The heart vibrates at infrasonic.
2. The speed of sound is more in gas than in liquid and solid.
3. Mach number is used to describe the speed of sound.
4. Ultrasonic sound has frequency more than 20,000 Hz.
Of these statements.

A) 1, 2 and 3 are correct B) 2, 3 and 4 are correct C) 1, 3 and 4 are correct D) 1, 2 and 4 are correct

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Answer & Solution

Answer: Option C

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Sounds waves and Motion MCQ question and answer with solution | Physics Gk MCQs