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Physics for IGCSE & O level - Electricity (Section 4 - No. 3)
If a circuit has a voltage of 12V and a resistance of 4 ohms, what is the power dissipated?
3 W
48 W
36 W
16 W
Maelezo
Use P = V^2 / R; Power = 12^2 / 4 = 36 W.
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