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Question (21)

QN006082

In a graphical sound wave, one complete wave consists of

(A) only one compression
(B) only one rarefaction
(C) one compression and one rarefaction
(D) two compressions only

Correct Answer: C

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Question (22)

QN006083

The graph of a louder sound differs mainly in

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

Correct Answer: B

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Question (23)

QN006084

The graph of a shrill sound differs mainly in

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

Correct Answer: C

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Question (24)

QN006085

A sound wave completes 300 oscillations in 6 seconds. Time period is

(A) 0.02 s
(B) 0.05 s
(C) 2 s
(D) 50 s

Correct Answer: A

Explanation:

Frequency = 300/6 = 50 Hz, so T = 1/50 = 0.02 s

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Question (25)

QN006086

A graphical wave pattern with closely spaced crests indicates

(A) low frequency
(B) high frequency
(C) low amplitude
(D) low speed

Correct Answer: B

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Question (26)

QN006087

A wave graph has wavelength 2.5 m and speed 500 m/s. Frequency is

(A) 100 Hz
(B) 150 Hz
(C) 200 Hz
(D) 250 Hz

Correct Answer: C

Explanation:

f = v/λ = 500/2.5 = 200 Hz

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Question (27)

QN006088

The midpoint about which particles oscillate in a wave graph is called

(A) crest
(B) trough
(C) mean position
(D) wavelength

Correct Answer: C

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Question (28)

QN006089

In a transverse representation of sound wave, the lowest point is called

(A) crest
(B) node
(C) trough
(D) compression

Correct Answer: C

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Question (29)

QN006090

The highest point in a wave graph is called

(A) trough
(B) crest
(C) rarefaction
(D) node

Correct Answer: B

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Question (30)

QN006091

A sound wave graph has amplitude 2 cm. Another wave has amplitude 4 cm. The second wave is

(A) softer
(B) equally loud
(C) louder
(D) slower

Correct Answer: C

Explanation:

Greater amplitude means louder sound.

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Question (21)

In a graphical sound wave, one complete wave consists of

Explanation:

Link:

Question (22)

The graph of a louder sound differs mainly in

Explanation:

Link:

Question (23)

The graph of a shrill sound differs mainly in

Explanation:

Link:

Question (24)

A sound wave completes 300 oscillations in 6 seconds. Time period is

Explanation:

Link:

Question (25)

A graphical wave pattern with closely spaced crests indicates

Explanation:

Link:

Question (26)

A wave graph has wavelength 2.5 m and speed 500 m/s. Frequency is

Explanation:

Link:

Question (27)

The midpoint about which particles oscillate in a wave graph is called

Explanation:

Link:

Question (28)

In a transverse representation of sound wave, the lowest point is called

Explanation:

Link:

Question (29)

The highest point in a wave graph is called

Explanation:

Link:

Question (30)

A sound wave graph has amplitude 2 cm. Another wave has amplitude 4 cm. The second wave is

Explanation:

Link:

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