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Question (31)

QN006132

The speed of sound in a medium depends mainly on

(A) colour of medium
(B) properties of medium
(C) loudness only
(D) amplitude only

Correct Answer: B

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Question (32)

QN006133

A sound wave has speed 360 m/s and frequency 120 Hz. Find wavelength.

(A) 2 m
(B) 3 m
(C) 4 m
(D) 5 m

Correct Answer: B

Explanation:

λ = v/f = 360/120 = 3 m

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Question (33)

QN006134

Which characteristic remains unchanged when sound travels from one medium to another?

(A) Speed
(B) Wavelength
(C) Frequency
(D) Amplitude

Correct Answer: C

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Question (34)

QN006135

If the frequency of a sound wave becomes double and speed remains constant, wavelength becomes

(A) double
(B) half
(C) four times
(D) unchanged

Correct Answer: B

Explanation:

Frequency and wavelength are inversely proportional.

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Question (35)

QN006136

A sound wave has frequency 150 Hz and wavelength 2.4 m. Speed is

(A) 180 m/s
(B) 240 m/s
(C) 300 m/s
(D) 360 m/s

Correct Answer: D

Explanation:

v = fλ = 150 × 2.4 = 360 m/s

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Question (36)

QN006137

Which characteristic of sound helps distinguish a male voice from a female voice?

(A) Loudness
(B) Pitch
(C) Speed
(D) Intensity only

Correct Answer: B

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Question (37)

QN006138

A sound wave with low frequency generally has

(A) high pitch
(B) low pitch
(C) high loudness
(D) zero amplitude

Correct Answer: B

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Question (38)

QN006139

The unit of time period is

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

Correct Answer: C

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Question (39)

QN006140

A sound wave completes one oscillation in 0.005 s. Frequency is

(A) 50 Hz
(B) 100 Hz
(C) 150 Hz
(D) 200 Hz

Correct Answer: D

Explanation:

f = 1/T = 1/0.005 = 200 Hz

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Question (40)

QN006141

Which statement is correct regarding characteristics of sound waves?

(A) Loudness depends on frequency only
(B) Pitch depends on amplitude only
(C) Frequency and time period are inversely related
(D) Wavelength is independent of speed

Correct Answer: C

Explanation:

Frequency and time period are inversely proportional.

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Question (31)

The speed of sound in a medium depends mainly on

Explanation:

Link:

Question (32)

A sound wave has speed 360 m/s and frequency 120 Hz. Find wavelength.

Explanation:

Link:

Question (33)

Which characteristic remains unchanged when sound travels from one medium to another?

Explanation:

Link:

Question (34)

If the frequency of a sound wave becomes double and speed remains constant, wavelength becomes

Explanation:

Link:

Question (35)

A sound wave has frequency 150 Hz and wavelength 2.4 m. Speed is

Explanation:

Link:

Question (36)

Which characteristic of sound helps distinguish a male voice from a female voice?

Explanation:

Link:

Question (37)

A sound wave with low frequency generally has

Explanation:

Link:

Question (38)

The unit of time period is

Explanation:

Link:

Question (39)

A sound wave completes one oscillation in 0.005 s. Frequency is

Explanation:

Link:

Question (40)

Which statement is correct regarding characteristics of sound waves?

Explanation:

Link:

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