Physics (AS & A Level) · May / June 2026 · Paper 13 · Question 31

A resistor with a resistance $R$ is connected to a cell. The current in the resistor is $I$ and the potential difference (p.d.) across the resistor is $V$. Which equations can be used to calculate the power dissipated in the resistor? 1 $P = I^2R$ 2 $P = VI$ 3 $P = \dfrac{V^2}{R}$

1. A1, 2 or 3
2. B1 or 2 only
3. C1 only
4. D2 only

As printed in the paper