Question #201803

Â A sinusoidal voltage having a maximum amplitude of 625 V is applied to the terminals of a 50Â Î©

Â The average power delivered to the resistor is:

Â Select one:

Â a 19531.25 W

Â b 6510.42 W

Â c 3906.25 W

Â d 9765.63 W

Â e 4882.61 W

Expert's answer

Given that

where

from Ohm's law

the instantaneous power p(t) absorbed by an element is the product of the instantaneous voltage v(t) across the element and the instantaneous current i(t) through it

Thus, the average power is given by

for a sinusoidal voltage with Ï‰=2Ï€/T

**Answer:** c) 3906.25 W

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