Time taken to complete 6 successive compressions if the time between two successive compressions of a wave is 4 sec is :
50 s
15 s
20 s
70 s
A
70 s
B
15 s
C
20 s
D
50 s
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Solution
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The time period of a longitudinal wave is defined as the time between two successive compressions or rarefactions.
As given the time between two successive compressions is 4s,
therefore time period of the wave will be T=4s.
The time between 6 successive compressions will be equal to 5 time periods,
i.e. =5×4=20s
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