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