Sounds waves and Motion MCQ question and answer with solution

61

Which one of the following is not an electromagnetic wave?

A) Light wave B) Radio wave C) Sound wave D) Microwave

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Answer & Solution

Answer: Option C

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62

Statement I Sound waves cannot propagate in vacuum.
Statement II Sound waves are elastic waves and require a medium to propagate.

A) Both the statements are true and statement II is the correct explanation of statement I B) Both the statements are true, but statement II is not the correct explanation of statement I C) Statement I is true, but statement II is false D) Statement I is false, but statement II is true

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Answer & Solution

Answer: Option A

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63

The characteristic of sound which distinguishes a female voice from a male voice is called

A) pitch B) phase C) quality D) loudness

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Answer & Solution

Answer: Option A

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64

Sound travels faster in solids than in gases because

A) density of solids is more B) modulus of elasticity is more than that of gases C) sound cannot travel through gases D) sound is an electromagnetic wave

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Answer & Solution

Answer: Option A

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65

As per the WHO, the safe noise level for a city is

A) 45 dB B) 50 dB C) 55 dB D) 60 dB

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Answer & Solution

Answer: Option A

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66

In television broadcast, the picture signals are transmitted by

A) Amplitude modulation B) Frequency modulation C) Phase modulation D) Angle modulation

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Answer & Solution

Answer: Option A

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67

When T.V. is switched on

A) Audio and video both start simultaneously B) Audio is heard immediately but video starts later because video needs some warm up time C) Video starts immediately but audio is heard later because sound travels at a lesser speed than light D) It depends on the T.V. brand

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Answer & Solution

Answer: Option A

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68

Which of the following statements regarding sound waves is not correct?

A) It travels at a speed of 330 - 350 m/s B) These are mechanical waves C) They do not require any type of medium to travel D) It cannot travel long distances

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Answer & Solution

Answer: Option C

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69

Assertion (A): Reveraberation mainly feels in large churches and in other large buildings.
Reason (R): The walls, roof and ground may cause multiple sound reflections.

A) Both (A) and (R) are true and (R) is the correct explanation of (A) B) Both (A) and (R) are true, but (R) is not the correct explanation of (A) C) (A) is true, but (R) is false D) (A) is false, but (R) is true

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Answer & Solution

Answer: Option A

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70

Which of the following types of light carries a signal from a television remote to the device it controls?

A) Polarised B) Ultraviolet C) Infrared D) X-ray

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Answer & Solution

Answer: Option C

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