ELECTRICAL POWER
1 mark · NormalWhich of the following best describes the unit watt (W)?
- A.The energy transferred per coulomb of charge.
- B.The charge that passes a point every second.
- C.The energy transferred per second.
- D.The resistance to current flow in a circuit.
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Show answer
Correct option: The energy transferred per second.
Also accept: Power is rate of energy transfer
Common mistakes: Choosing energy per coulomb (definition of volt)
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Marking points
B1 · 1 mark · Identify watt as energy per second (unit of power).
Worked solution
The watt (W) is defined as one joule of energy transferred per second.