Which of the following quantities is correctly matched to its unit?
Correct answer: C. Electric power: Watt (W)
- A. Electric charge: Ampere (A)
- B. Current: Volt (V)
- C. Electric power: Watt (W)
- D. Resistance: coulomb
Explanation
Electric power: Watt (W), which is correct. Watt is the unit of electric power, defined as the rate of energy transfer.
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About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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