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Electric Circuits and Networks, Ist Edition by Pearson
book

Electric Circuits and Networks, Ist Edition by Pearson

by K. S. Suresh Kumar
May 2024
Intermediate to advanced content levelIntermediate to advanced
840 pages
45h 20m
English
Pearson India
Content preview from Electric Circuits and Networks, Ist Edition by Pearson
An electrical element draws a current of i(t) 2 cos100πt A from a sinusoidal voltage
source of v(t) 102 sin100πt V. Find and plot instantaneous power delivered to the
load and energy delivered to it as functions of time.
SOLUTION
p(t) –20 sin100
π
t cos100
π
t –10 sin200
π
t W and E(t) –0.05(1 – cos200
π
t) J.
Power waveform has 100 Hz frequency whereas the voltage and current wave-
forms have 50 Hz frequency. The period of the power waveform is 10 ms.
Average value of power over a cycle . Therefore, the
energy function cannot be a growing function. The net change in E(t) over a cycle of
power waveform will be zero. It has to be an alternating ...
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Publisher Resources

ISBN: 9781299447028