Sounds waves and Motion MCQ question and answer with solution

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Each section contains 100 MCQs on Sounds waves and Motion .

Which of the following are electromagnetic waves?

A) Alpha rays B) Audible waves C) X-ray D) β-rays

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

What is the approximate speed of sound in distilled water at 25°C (77°F)?

A) 1598 m/s B) 1285 m/s C) 1498 m/s D) 3980 m/s

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

If T is the time period of an oscillating pendulum, then which one of the following statement is not correct?

A) The motion repeats after time T only once B) T is the least time after which motion repeats itself C) The motion repeats itself after nT, where n is a positive integer D) T remains the same only for small angular displacements

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The time period of a sound wave is 0.01 seconds. Find its frequency (in Hz).

A) 100 B) 10 C) 50 D) 20

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Answer & Solution

Answer: Option A

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How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?

A) 10 metre B) 17 metre C) 24 metre D) 30 metre

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Which of the following statements are true/false about the speed of sound in different mediums at 25°C?
A. In seawater, the speed of sound is 1531 km/s.
B. In water (distilled), the speed of sound is 1498 km/s.

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which type of sound waves can propagate in solids?

A) Longitudinal only B) Transverse only C) Either longitudinal or transverse D) Non mechanical waves only

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Sound wave in air is

A) transverse B) longitudinal C) electromagnetic D) polarised

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

When a stone is dropped on the surface of still water, the waves produced are

A) longitudinal B) transverse C) stationary D) partly transverse and partly longitudinal

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Answer & Solution

Answer: Option B

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If the frequency of a sound wave is 50 hertz, find its time period.

A) 0.05 second B) 0.02 second C) 0.5 second D) 0.2 second

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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