How much current does a 60 W light bulb draw if it operates at a voltage of 120 V?
Correct answer: B. 0.5 amp
- A. 0.25 amp
- B. 0.5 amp
- C. 2 amp
- D. 4 amp
- E. 30 amp
Explanation
P=VI Rearranging this formula, I=P/V =60/120 =0.5 A
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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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