Sounds waves and Motion MCQ question and answer with solution

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Each section contains 100 MCQs on Sounds waves and Motion .

Why can not the sound is heard on the Moon?

A) No sound on the Moon B) Because there is no water on the Moon C) There is no atmosphere on the Moon and sound cannot travel without medium D) People who go to the moon become deaf

Discuss

Answer & Solution

Answer: Option C

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

Sound moves with higher velocity if

A) pressure of themedium is decreased B) temperature of the medium is increased C) humidity of the medium D) Both B and C

Discuss

Answer & Solution

Answer: Option D

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

A biotechnique in which ultrasonic sound is used

A) Sonography B) E.C.G C) E.E.G D) X-ray

Discuss

Answer & Solution

Answer: Option A

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

At 20°C, the speed of sound in water approximately

A) 330 m/s B) 800 m/s C) 1500 m/s D) 5000 m/s

Discuss

Answer & Solution

Answer: Option C

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

The velocity of a wave is frequency (f) and wavelength (λ) ?

A) $$v = \frac{1}{{f\lambda }}$$ B) v = f λ C) $$v = \frac{\lambda }{f}$$ D) $$v = \frac{f}{\lambda }$$

Discuss

Answer & Solution

Answer: Option B

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

Which of the following has the longest wavelength?

A) Infrared B) X-rays C) Visible light D) Radio waves

Discuss

Answer & Solution

Answer: Option D

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

Which of the following are the characteristics of electromagnetic waves?
1. They are elastic waves.
2. They can also move in vacuum.
3. They have electric and magnetic components which are mutually perpendicular.
4. They move with a speed equal to 3 lakh meters per second.
Select the correct answer:

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

Discuss

Answer & Solution

Answer: Option C

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

A source of frequency 500 Hz emits waves of 0.4 m wavelength. How long time will it take by the wave to travel 600 meters?

A) 9 seconds B) 6 seconds C) 3 seconds D) 12 seconds

Discuss

Answer & Solution

Answer: Option C

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

What is the repeated reflection of sound from the walls of a large hall, which results in the persistance of sound?

A) pitch B) music C) note D) reverberation

Discuss

Answer & Solution

Answer: Option D

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

Which term is not associated with sound wave?

A) Hertz B) Decibel C) Candela D) Mach

Discuss

Answer & Solution

Answer: Option C

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