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Electricity and Magnetism

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Moderate

Ratio of Powers in Circuits with Alternating Current

EANDM-E$1SFP

A circuit contains a resistor hooked up across an alternating voltage source with a peak voltage, $V_{peak}=10\,V$. The average power consumed in the resistor is $10\,W$.

What is the peak value of the current, $I_{peak}$?

A

$I_{peak}=2\,A$

B

$I_{peak}=\sqrt{2}\,A$

C

$I_{peak}=4\,A$

D

$I_{peak}=0.5\,A$

E

$I_{peak}=\cfrac{1}{\sqrt{2}}\,A$