A circuit consists of an ideal ac generator, a 20-uF capac- itor, and an 80-2 resistor, all connected in series. The output of the generator has a peak emf of 20 V, and the armature of the genera- tor rotates at 400 rad/s. Find (a) the power factor, (b) the rms current, and (c) the average power supplied by the generator. 62

A circuit consists of an ideal ac generator, a 20-uF capac- itor, and an 80-2 resistor, all connected in series. The output of the generator has a peak emf of 20 V, and the armature of the genera- tor rotates at 400 rad/s. Find (a) the power factor, (b) the rms current, and (c) the average power supplied by the generator. 62

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter15: Alternating-current Circuits

Section: Chapter Questions

Problem 7CQ: Can the instantaneous power output of an ac source ever be negative? Can the average power output be...

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