Physics GK · all questions

Sounds waves and Motion
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Q141

Speed of sound in air is unaffected by change in

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Q142

Bats can fly during dark nights and also prey. This is because

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Q143

What is the intensity level of very low audio sound?

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Q144

Which of the following determines the loudness or softness of a sound?

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Q145

If the frequency of a wave increases, what will be the effect on its wave length?

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Q146

Sound produced by a radio increases by:

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Q147

Which type of waves is used to penetrate hard object at hospital and airport?

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Q148

As an empty vessel is filled with water its frequency

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Q149

If the time period of a sound wave is 0.04s, then what is its frequency?

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Q150

Particles oscillate up and down perpendicular to the direction of propagation of the wave, what kind of waves are discussed here-

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Q151

Which of the following sound wave will have the longest wavelength?

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Q152

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

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Q153

An object travelling at a speed greater than the speed of sound in air is called . . . . . . . .

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Q154

The amplitude of the wave is-

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Q155

Which of the following is the time taken for a complete oscillation of a sound wave in the density of the medium?

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Q156

. . . . . . . . determines the speed of sound in a medium.

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Q157

Which of the following is not electromagnetic wave?

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Q158

Sound above what level (in decibel) is considered hazardous noise pollution?

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Q159

Match List I (Electromagnetic Wave) with List II (Discoverer) and select the correct answer:

List-I	List-II
a. Infrared waves	1. Ritter
b. Ultraviolet rays	2. Newton
c. X-rays	3. Herchel
d. Visible rays	4. W Roentgen

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Q160

A human being cannot tolerate very loud sound. What is the level of loudness which a human being can tolerate?

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