What is the frequency of a wave whose time period is $0.05$ second?

10 H z

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20 H z

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40 H z

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n o n e

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Solution

The correct option is A $20 H z$
f = $\frac{1}{t}$ = $\frac{1}{0.05}$ = $\frac{100}{5}$ = 20HZ

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