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. [ Return to question menu ] 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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