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Question (1)

QN005962

The distance between two consecutive compressions in a sound wave is called

(A) amplitude
(B) frequency
(C) wavelength
(D) intensity

Correct Answer: C

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Question (2)

QN005963

The SI unit of frequency is

(A) decibel
(B) hertz
(C) metre
(D) second

Correct Answer: B

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Question (3)

QN005964

The time taken for one complete oscillation is known as

(A) wavelength
(B) amplitude
(C) intensity
(D) time period

Correct Answer: D

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Question (4)

QN005965

Frequency is defined as the number of oscillations

(A) per metre
(B) per second
(C) per minute
(D) per wavelength

Correct Answer: B

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Question (5)

QN005966

The maximum change in density in a sound wave is called

(A) pitch
(B) wavelength
(C) amplitude
(D) frequency

Correct Answer: C

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Question (6)

QN005967

The amount of sound energy passing through unit area per unit time is called

(A) loudness
(B) intensity
(C) pitch
(D) timbre

Correct Answer: B

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Question (7)

QN005968

A sound wave completes 80 oscillations in 4 seconds. Its frequency is

(A) 10 Hz
(B) 20 Hz
(C) 40 Hz
(D) 320 Hz

Correct Answer: B

Explanation:

Frequency = oscillations/time = 80/4 = 20 Hz

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Question (8)

QN005969

The time period of a wave having frequency 50 Hz is

(A) 0.5 s
(B) 0.02 s
(C) 5 s
(D) 20 s

Correct Answer: B

Explanation:

T = 1/f = 1/50 = 0.02 s

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Question (9)

QN005970

A sound wave has wavelength 2 m and frequency 170 Hz. Its speed is

(A) 85 m/s
(B) 170 m/s
(C) 340 m/s
(D) 680 m/s

Correct Answer: C

Explanation:

v = fλ = 170 × 2 = 340 m/s

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Question (10)

QN005971

A sound wave travelling with speed 300 m/s has frequency 150 Hz. Its wavelength is

(A) 0.5 m
(B) 2 m
(C) 4.5 m
(D) 450 m

Correct Answer: B

Explanation:

λ = v/f = 300/150 = 2 m

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Question (1)

The distance between two consecutive compressions in a sound wave is called

Explanation:

Link:

Question (2)

The SI unit of frequency is

Explanation:

Link:

Question (3)

The time taken for one complete oscillation is known as

Explanation:

Link:

Question (4)

Frequency is defined as the number of oscillations

Explanation:

Link:

Question (5)

The maximum change in density in a sound wave is called

Explanation:

Link:

Question (6)

The amount of sound energy passing through unit area per unit time is called

Explanation:

Link:

Question (7)

A sound wave completes 80 oscillations in 4 seconds. Its frequency is

Explanation:

Link:

Question (8)

The time period of a wave having frequency 50 Hz is

Explanation:

Link:

Question (9)

A sound wave has wavelength 2 m and frequency 170 Hz. Its speed is

Explanation:

Link:

Question (10)

A sound wave travelling with speed 300 m/s has frequency 150 Hz. Its wavelength is

Explanation:

Link:

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