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A sine wave completes half cycle in ____ radians.(a) π/2(b) π(c) π/4(d) 2πI got this question in an interview.My question is taken from Angular Relation of a Sine Wave in chapter Introduction to Alternating Currents and Voltages of Network Theory

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Right ANSWER is (b) π

The EXPLANATION is: The period of a sine WAVE is 360⁰ or 2π radians. So, a sine wave takes 90⁰ or π/2 radians to complete a HALF CYCLE.



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