alleryThe equivalent steady current giving the same average power loss is the:
ARatio of mean squares
BRoot mean square
CRoot median squad
DRate of mean squares
Answer & Solution
Correct answer: B. Root mean square
1. An alternating current averages to zero over a cycle.
2. A different average is needed to describe its heating effect.
3. That is the root mean square current.
4. It is the equivalent dc current producing the same average power loss.
_Source: syllabus Physics Part I, Ch 7 'Alternating Current'_
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