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When one sine wave passes through the zero following the other, it is _________

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in Basic Electrical Engineering by (88.7k points)
When one sine wave passes through the zero following the other, it is _________

(a) Leading

(b) Lagging

(c) Neither leading nor lagging

(d) Either leading or lagging

The question was posed to me at a job interview.

Enquiry is from Representation of an Alternating Quantity by a Phasor in chapter Alternating Voltage and Current of Basic Electrical Engineering

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The correct answer is (b) Lagging

To explain I would say: The sine wave is said to lag because it passes though zero following the other, hence it crosses zero after the first wave, therefore it is said to lag.

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