Sounds waves and Motion MCQ question and answer with solution

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Each section contains 100 MCQs on Sounds waves and Motion .

Decibel is the unit of

A) speed of light B) intensity of heat C) intensity of sound D) quantum of mass

Discuss

Answer & Solution

Answer: Option C

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

The speed of sound depends on which property of the medium.

A) All of these B) Temperature C) Elasticity D) Moisture

Discuss

Answer & Solution

Answer: Option A

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

What are transverse waves?

A) In these waves, the particles of the medium vibrate perpendicular to the direction of propagation of the waves B) In these waves, the particles of the medium vibrate in the parallel direction of propagation of the waves C) These are the waves which do not require medium for their propagation D) These are the longitudinal mechanical waves

Discuss

Answer & Solution

Answer: Option A

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

Which one of the following statements about sound is not correct?

A) Sound travels at a speed slower than the speed of light B) Sound waves are transverse waves C) Sound waves are longitudinal waves D) Sound travels faster in moist air than in dry air

Discuss

Answer & Solution

Answer: Option B

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

The frequency of a wave travelling at a speed of 500ms^-1 is 20Hz. It's time period is-

A) 4 seconds B) 25 seconds C) 0.05 second D) 0.04 seconds

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Answer & Solution

Answer: Option C

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

At what stage should the medium required for the transmission of sound-

A) Solid B) Gas C) Fluid D) All of these

Discuss

Answer & Solution

Answer: Option D

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

A spring can be used to determine the mass m of an object in two ways : I by measuring the extension in the spring due to the object and II by measuring the oscillation period for the given mass.
Which of these methods can be used in a space-station orbiting the earth?

A) Both I and II B) Only the extension method C) Only the oscillation method D) Neither I nor II

Discuss

Answer & Solution

Answer: Option C

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

The technique used to absorb noise by using soft and porous surface is called:

A) Sound protection B) Audio security C) Rotation D) Absorption

Discuss

Answer & Solution

Answer: Option A

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

A sound wave travels at a speed of 340 m/s. If its wavelength is 2 cm, what is the frequency of the wave?

A) 17000Hz B) 170 Hz C) 17000 Hz D) 1700Hz

Discuss

Answer & Solution

Answer: Option A

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

What is the decibel level of sound produced by two persons in conversation?

A) About 5 decibel B) About 10 decibel C) About 30 decibel D) About 100 decibel

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