IN AN AC CIRCUIT THE PEAK VALUE OF THE P.D IS 180V. WHAT IS THE INSTATANEOUS P.D WHEN IT HAS REACH

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IN AN AC CIRCUIT THE PEAK VALUE OF THE P.D IS 180V. WHAT IS THE INSTATANEOUS P.D WHEN IT HAS REACH (1/8)TH OF A CYCLE? (WAEC 1989)

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  # Physics