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Physics for IGCSE & O level - Electricity (Section 6 - No. 38)

What happens to the power dissipated by a resistor if the voltage across it is doubled?
The power is halved
The power doubles
The power quadruples
The power remains the same

توضيح

Because power (P) = V^2/R. If the voltage doubles, the power becomes four times greater.

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