Physics (AS & A Level) · May / June 2018 · Paper 13 · Question 37

The circuit diagram shows a battery of electromotive force (e.m.f.) 9.0 V and negligible internal resistance. It is connected to two resistors of resistances 160 Ω and R. The output potential difference V_out is 4.0 V. What is the resistance R?

1. A32 Ω
2. B49 Ω
3. C71 Ω
4. D128 Ω

As printed in the paper