Electric power is _.
Correct answer: A. Ratio of electric work done per unit time
- A. Ratio of electric work done per unit time
- B. Voltage per unt time
- C. Electric charge per unit time
- D. Current per unit time
Explanation
Power is simply defined as the rate of doing work or work done / time. Therefore electric power can be defined as the rate of electric work done or electric work done / time. Hence Option A is correct.
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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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