Physics (AS & A Level) · Oct / Nov 2024 · Paper 13 · Question 34

The potential difference (p.d.) across a fixed resistor is V. The power dissipated in the resistor is 5.0 W. The p.d. across the resistor then changes to a new value. With the new p.d. the energy transferred to the resistor in a time of 2.25 s is 45.0 J. What is the new p.d. across the resistor?

1. A\frac{1}{2}V
2. B2V
3. C3V
4. D4V

As printed in the paper