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The frequency of a sine wave is 30Hz. What is its period?

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The frequency of a sine wave is 30Hz. What is its period?

(a) 3333ms

(b) 333.3ms

(c) 33.33ms

(d) 3.333ms

The question was posed to me by my school principal while I was bunking the class.

This is a very interesting question from Angular Relation of a Sine Wave topic in chapter Introduction to Alternating Currents and Voltages of Network Theory

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The correct choice is (c) 33.33ms

The best explanation: We know that the frequency and time period are inversely proportional to each other. So  T=1/f =1/30=0.03333s=33.33ms.

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