Physics (AS & A Level) · Feb / March 2023 · Paper 12 · Question 36

A battery of electromotive force (e.m.f.) 10 V and internal resistance r is connected to three resistors of resistances R, 2.0 Ω and 15 Ω, as shown. A current of 0.45 A is in the resistor of resistance 2.0 Ω and a current of 0.48 A is in the resistor of resistance 15 Ω. What are the values of r and R?

1. Ar = 3.0 Ω, R = 14 Ω
2. Br = 3.0 Ω, R = 20 Ω
3. Cr = 5.8 Ω, R = 14 Ω
4. Dr = 5.8 Ω, R = 20 Ω

As printed in the paper