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Q.

Frequency of a sound wave is 10 Hz. What is the time interval when the compression of the wave is repeated?


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a

1 sec

b

0.5 sec

c

0.1 sec

d

0.05 sec 

answer is C.

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Detailed Solution

Frequency of a sound wave is 10 Hz. The time interval when the compression of the wave is repeated is 0.1 sec.
Frequency is the number of oscillations completed in one second. One oscillation is the path of a particle between two consecutive points in a wave either its compression or rarefaction. So the time period is the time taken to complete one circle or oscillation is
     T=1/f
T= 1/10 
T=0.1 sec
 
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