Sounds waves and Motion MCQ question and answer with solution

91

Speed of sound in seawater . . . . . . . . it occurs.

A) 1948 m/s B) 1351 m/s C) 1531 m/s D) 1498 m/s

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Answer & Solution

Answer: Option C

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92

Which of the following will have the maximum speed of sound at 25°C?

A) Brass B) Steel C) Aluminium D) Iron

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Answer & Solution

Answer: Option C

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93

Which of the following statements are true/false about the speed of sound in different mediums on 25°C
A. In water (marine), the speed of sound is 1531 m/s.
B. In ethanol, the speed of sound is 1200 km/s.

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

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Answer & Solution

Answer: Option A

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94

Longitudinal waves cannot travel through

A) vacuum B) solid C) liquid D) gas

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Answer & Solution

Answer: Option A

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95

To hear different echoes, the minimum distance of obstruction from the source of sound should be . . . . . . . .

A) 172 m B) 17.2 m C) 344 m D) 34.4 m

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Answer & Solution

Answer: Option B

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96

The velocity of a particle performing simple harmonic motion when it passes through its mean position is

A) infinity B) zero C) minimum D) maximum

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Answer & Solution

Answer: Option D

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97

The sounds having a frequency of 20 Hz to 20000 Hz are known as

A) audible sounds B) ultrasonics C) infrasonics D) megasonics

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Answer & Solution

Answer: Option A

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98

A maritime survey ship sends a sound wave to the ocean floor, which receives an echo or resonance after 2.5 s. The speed of sound in seawater is 1200 ms^-1. What is the depth of the ocean?

A) 1000 m B) 1200 m C) 2500 m D) 1500 m

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Answer & Solution

Answer: Option D

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99

Which of the following statements is correct?

A) If the constituents of the medium oscillate perpendicular to the direction of wave propagation, we call the wave as a longitudinal wave B) If the constituents of the medium oscillate along the direction of wave propagation, we call the wave as a transverse wave C) Frequency of a wave is the number of oscillations of each constituent particle in the vibrating medium per minute D) The minimum distance between two points in a wave having the same phase at a particular instant of time is called the wavelength

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Answer & Solution

Answer: Option D

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100

An astronaut cannot hear his companion ar the surface of the Moon because

A) Produced frequencies are above the audio frequency B) Temperature is too low during night and too high during day C) There is no medium for sound propagation D) There are many craters on the surface of the Moon

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Answer: Option C

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