A resistor and an inductor (modelling a motor winding) are connected in series across…

PHYSICS · Multi-part · Fermi University Physics · Electronics, Instrumentation & Communication · Circuit foundations and passive networks · Circuit foundations and passive networks

Electronics for Measurement, Ch Phasors, impedance and the frequency response

Problem

A resistor

R = 50\,\Omega

and an inductor

L = 15\,\mathrm{mH}

(modelling a motor winding) are connected in series across an ideal sinusoidal source of peak value

10\,\mathrm V

2.0\,\mathrm{kHz}

. The steady state applies. ((a)) Find the series impedance

Z = R + j\omega L

in polar form. ((b)) Find the peak current drawn from the source. ((c)) Find the average power delivered by the source.

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