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Question (11)

QN006072

A sound wave graph has wavelength 4 m and speed 320 m/s. Frequency is

(A) 40 Hz
(B) 60 Hz
(C) 80 Hz
(D) 1280 Hz

Correct Answer: C

Explanation:

f = v/λ = 320/4 = 80 Hz

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Question (12)

QN006073

In graphical representation, amplitude is measured along the

(A) horizontal axis
(B) vertical axis
(C) diagonal axis
(D) wavelength axis

Correct Answer: B

Explanation:

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Question (13)

QN006074

A wave graph with larger amplitude represents sound that is

(A) softer
(B) louder
(C) slower
(D) shriller only

Correct Answer: B

Explanation:

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Question (14)

QN006075

A wave graph with higher frequency represents sound that is

(A) louder
(B) softer
(C) shriller
(D) slower

Correct Answer: C

Explanation:

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Question (15)

QN006076

The number of waves completed in one second can be determined directly from the graph using

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

Correct Answer: C

Explanation:

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Question (16)

QN006077

If wavelength doubles while speed remains constant, frequency becomes

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

Correct Answer: B

Explanation:

Frequency is inversely proportional to wavelength.

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Question (17)

QN006078

A sound wave graph shows a time period of 0.02 s. Frequency is

(A) 20 Hz
(B) 25 Hz
(C) 50 Hz
(D) 100 Hz

Correct Answer: C

Explanation:

f = 1/T = 1/0.02 = 50 Hz

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Question (18)

QN006079

Which part of a longitudinal wave graph corresponds to high pressure region?

(A) Rarefaction
(B) Compression
(C) Trough
(D) Node

Correct Answer: B

Explanation:

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Question (19)

QN006080

Rarefaction in a sound wave graph represents

(A) high density region
(B) high pressure region
(C) low density region
(D) maximum amplitude only

Correct Answer: C

Explanation:

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Question (20)

QN006081

A wave graph has frequency 100 Hz and wavelength 3.4 m. Speed is

(A) 34 m/s
(B) 170 m/s
(C) 340 m/s
(D) 680 m/s

Correct Answer: C

Explanation:

v = fλ = 100 × 3.4 = 340 m/s

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Question (11)

A sound wave graph has wavelength 4 m and speed 320 m/s. Frequency is

Explanation:

Link:

Question (12)

In graphical representation, amplitude is measured along the

Explanation:

Link:

Question (13)

A wave graph with larger amplitude represents sound that is

Explanation:

Link:

Question (14)

A wave graph with higher frequency represents sound that is

Explanation:

Link:

Question (15)

The number of waves completed in one second can be determined directly from the graph using

Explanation:

Link:

Question (16)

If wavelength doubles while speed remains constant, frequency becomes

Explanation:

Link:

Question (17)

A sound wave graph shows a time period of 0.02 s. Frequency is

Explanation:

Link:

Question (18)

Which part of a longitudinal wave graph corresponds to high pressure region?

Explanation:

Link:

Question (19)

Rarefaction in a sound wave graph represents

Explanation:

Link:

Question (20)

A wave graph has frequency 100 Hz and wavelength 3.4 m. Speed is

Explanation:

Link:

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