Find the time period of a wave whose frequency is 400 Hz?

0.0012 s

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0.0025 s

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0.0015 s

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0.0010 s

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Solution

The correct option is B 0.0025 s
frequency $=$ $1 /$ Time period
ATQ, Time period $=$ $\frac{1}{400} = 0.0025 s$
$∴$ Option (B) is the correct answer.

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