Physics Review Question

Unit: Electricity and magnetism
Year: 1992 Question#: 24
Question: Which is a unit of electrical power?
(1 ) volt/ampere
(2 ) ampere/ohm
(3 ) ampere2/ohm
(4 ) volt2/ohm

What is this question really asking?




Explanation by: Adam C.
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Answer 1
volt/ampere

incorrect

The power formula says P=VI or P=I2R or P=V2/R. There is no P=V/A return to top























Answer 2

ampere/ohm

INCORRECT

The power formula says P=VI or P=I2R or P=V2/R. There is no P=A/R return to top



























Answer 3
ampere2/ohm

INCORRECT

The power formula says P=VI or P=I2R or P=V2/R. There is no P=A2/R return to top


























Answer 4
volt2/ohm

CORRECT

The power formula says P=VI or P=I2R or P=V2/R. V2/R works because V=volts and R=ohms return to top


























What's this question really asking?

What is one of the formulas for power? return to top

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