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Question

Time period of a wave if 10 waves are produced in 4 s.
0.4 sec
0.2 sec
0.8 sec
1.0 sec

A

0.8 sec

B

0.4 sec

C

0.2 sec

D

1.0 sec

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Solution

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Time period is the time taken per wave.
Thus, for 10 waves the time period will be $4 / 10 = 0.4 s$

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