Sounds waves and Motion MCQ question and answer with solution

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Each section contains 100 MCQs on Sounds waves and Motion .

The distance between two consecutive crests is L, then the wavelength is given by:

A) By $$\frac{L}{2}$$ B) By $$\frac{L}{4}$$ C) By 2L D) By L

Discuss

Answer & Solution

Answer: Option D

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

What is the wavelength of a sound wave in a medium with a frequency of 840 Hz and a speed of 380 m/s?

A) 0.45 m B) 5.45 m C) 1.45 m D) 2.45 m

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Answer & Solution

Answer: Option A

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

What is the speed of sound in air?

A) 373 m/sec B) 434 m/sec C) 343 m/sec D) 383 m/sec

Discuss

Answer & Solution

Answer: Option C

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

Least audible sound for most of the human ear is

A) 10.0 μ bar B) 0.0002 μ bar C) 0.005 μ bar D) 5.0 μ bar

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Answer & Solution

Answer: Option B

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

The figure given below shows the function of ultrasonic waves. What are these techniques called?
Sounds waves and Motion mcq question image

A) CT scan B) Magnetic resonance imaging C) Ultrasonography D) X-ray imaging technology

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Answer & Solution

Answer: Option C

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

What is the effect of pressure on the speed of sound?

A) The speed of sound increases with increase in pressure and vice versa B) The speed of sound decreases with increase in pressure and vice versa C) The speed of sound is not affected by pressure D) First the speed of sound increases with increase in pressure then starts decreasing though the pressure increases

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Answer & Solution

Answer: Option C

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

What are infra-red rays?

A) Longitudinal waves B) Transverse waves C) Mechanical waves D) Electromagnetic waves

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Answer & Solution

Answer: Option D

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

Which of the following statements about the movement of sound in different mediums is true/false on 25°C?
A. In water (seawater), the speed of sound is 1531 m/s.
B. In air, the speed of sound is 346 km/s.

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

Discuss

Answer & Solution

Answer: Option B

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

An echo is heard after 5 s of the production of sound which moves with a speed of 340 m/s. What is the distance of the mountain from the source of sound which produced the echo?

A) 0.085 km B) 0.85 km C) 0.17 km D) 1.7 km

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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 is the number of vibration made per unit time of a sound wave?

A) Time period B) Amplitude C) Wavelength D) The frequency

Discuss

Answer & Solution

Answer: Option D

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