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Speed of Sound

Which of the ...

Question

Which of the following statements is/are correct regarding the graphs shown? (Assume that the graphs are drawn to the same scale.)

A

Both the waves have the same frequency.

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B

The frequency of wave A is higher than that of wave B.

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C

The frequency of wave B is higher than that of wave A.

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D

Both the waves have the same amplitude.

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Solution

The correct options are
C The frequency of wave B is higher than that of wave A.
D Both the waves have the same amplitude.
It can be noticed from the graphs that both the waves have the same amplitude, i.e., 4 units on pressure axis.

Wave A completes one oscillation in the same time taken for wave B to complete two oscillations, i.e., 8 units on time axis. Thus, the frequency of B is higher than that of wave A.

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