An electric iron is 20V & 500W . The unit consumed by it (in kJ) in using it for 24 hours will be:
Correct answer: A. 12 units
- A. 12 units
- B. 24 units
- C. 5 units
- D. 1100 units
Explanation
Power = energy/time500 = E/24E = 500 x 24 = 12,000 J
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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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