A circuit has a 6 V battery and two resistors of 3 Ω each in parallel. The power consumed by the entire circuit is:
Correct answer: D. 24 W
- A. 6 W
- B. 12 W
- C. 18 W
- D. 24 W
Explanation
Equivalent resistance for two 3 Ω resistors in parallel is Rₑ𝑞 = (3 × 3)/(3 + 3) = 1.5 Ω. Total current I = V/Rₑ𝑞= 6/1.5 = 4 A. Power P = VI = 6 × 4 = 24 W.
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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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