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An AC source rated 100 V (rms) supplies a current of 10A (rms) to a circuit. The average power delivered by the source:

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must be 1000 W

may be greater than 1000 W

may be equal or less than 1000 W

all of the above three are possible

answer is C.

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Detailed Solution

$P_{a v} = E_{v} I_{v} \cos ϕ = 100 \times 10 \cos ϕ = 1000 \cos ϕ W a t t$
So depending upon value of $ϕ, P_{a v}$ can be equal to or less than 1000 W.

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