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The rms value of an alternating current equals which steady dc?
AThe dc equal to the peak current
BThe dc giving the same average power loss
CThe dc that charges a capacitor equally
DThe dc with the same frequency
Answer & Solution
Correct answer: B. The dc giving the same average power loss
The rms current is defined as the equivalent dc that produces the same average heating, so P = I squared R holds for both.
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