Find the time period of a wave those frequency is $5 k H z$ .

0.0002 s

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0.0001 s

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0.0005 s

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0.001 s

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Solution

The correct option is A $0.0002 s$
We know that, frequency $f = 1 / T$
Thus, time period $T = 1 / f = 1 / (5000) = 0.0002$ $s$

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If the wavelength of a sound wave is 40 cm and the time period T = 0.0005 s, then it takes ___ seconds to travel 4 km.

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5 k H z

2 M H z

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