alleryStart learning →Of the three expressions given for electric power, how many are valid for any circuit element?
AOnly the last one
BNone of the three
COnly the first one
DAll three of them
Answer & Solution
Correct answer: C. Only the first one
1. The power expressions differ in how general they are.
2. Three expressions for electric power are given.
3. The first equation is always valid.
4. The other two can be used only for resistors.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 20 'Electric Current, Resistance, and Ohm's Law', sections 20.1-20.7_
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