Sounds waves and Motion MCQ question and answer with solution

1

An Assertion and a Reason are given below
Assertion: When a velocity is kept constant and wavelength is halved, then the frequency is doubled
Reason: Velocity = Frequency × Wavelength
Choose the answer:

A) Both assertion and reason are true and reason is the correct explanation of assertion B) Both assertion & reason are true but reason is not the correct explanation of assertion C) Both assertion and reason are false D) Assertion is true but the reason is false

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Answer & Solution

Answer: Option A

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2

What is the distance between a crest and a consecutive trough in a transverse wave?

A) Wavelength B) Amplitude C) Half of the wavelength D) Twice of wavelength

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Answer & Solution

Answer: Option D

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3

Which of the following statements is not correct regarding the travel of sound waves?

A) Sound waves can travel through water B) Sound waves can travel throught air C) Sound waves can travel through steel D) Sound waves can travel through vacuum

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Answer & Solution

Answer: Option D

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4

Which one of the following statements is not correct?

A) The velocity of sound in air is independent of pressure B) The velocity of sound in air increases with increase of temperature C) The velocity of sound in air decreases as the humidity increases D) The velocity of sound in air is not affected by the change in amplitude and frequency

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Answer & Solution

Answer: Option C

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5

A boat at anchor is rocked by waves whose consecutive crests are 125 m apart. The velocity of the wave of moving crests is 25 ms^-1. What is the frequency of the rocking of the boat?

A) 0.20 Hz B) 625 hertz C) 100 Hz D) 250 Hz

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Answer & Solution

Answer: Option A

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6

Sound waves travel fastest in

A) Solids B) Liquids C) Gases D) Vacuum

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Answer & Solution

Answer: Option A

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7

The restoring force of SHM is maximum when particle

A) displacement is maximum B) is half way between the mean and extreme position C) crosses mean position D) is at rest

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Answer & Solution

Answer: Option A

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8

Which one of the following wave does not belong to the category of the other three?

A) X-rays B) Microwaves C) Radiowaves D) Sound waves

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Answer & Solution

Answer: Option D

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9

. . . . . . . . are harmful radiation emitted by the Sun-

A) Gamma rays B) UV radiation C) Infrared radiation D) Alpha ray

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Answer & Solution

Answer: Option B

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10

Ultrasonics are sound waves of frequency

A) Greater than 20,000 Hz B) Less than 10,000 Hz C) Equal to 1000 Hz D) None of the above

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Answer & Solution

Answer: Option A

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