Find the frequency of a wave whose time period is $0.5 s$ .

2 H z

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3 H z

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5 H z

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0.2 H z

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Solution

The correct option is A $2 H z$
Given, time period $t = 0.5 s$
Let the frequency be $f$ .
We know, $f = \frac{1}{t}$
$∴ f = \frac{1}{0.5} = 2 H z$

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