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AC voltage source changes its polarity-------- in one period? Once/Twice/Thrice/None

Answer»

OnceExplanation:AC voltage is a sinusoidal SIGNAL. The MAGNITUDE of an AC signal changes continuously. ONE period of AC signal includes 360°. During one period of the signal, the AC voltage changes from positive (0° to 180°) to NEGATIVE (180° to 360°) just once.



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