Engineering Board Exam Reviewer · Alternating Current and Voltage · medium
A sinusoidal voltage with a peak value of 100 V is applied across a 50, resistor. What average power does the resistor dissipate?
- 100 W
- 200 W
- 81.2 W
- 50 W
Answer
A. 100 W
Solution
Vrms=100/ 2=70.7 V. P= Vrms2R=(70.7)2/50=100 W.
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