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The period of a sine wave is 40ms. What is the frequency?

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The period of a sine wave is 40ms. What is the frequency?

(a) 25

(b) 50

(c) 75

(d) 100

This question was posed to me in an online interview.

This intriguing question originated from Angular Relation of a Sine Wave in chapter Introduction to Alternating Currents and Voltages of Network Theory

1 Answer

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The correct option is (a) 25

The explanation is: We know that the frequency and time period are inversely proportional to each other. So f = 1/T = 1/40ms = 25Hz.

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