Physics (AS & A Level) · May / June 2019 · Paper 13 · Question 38

Two cells of electromotive force (e.m.f.) 3.0 V and 1.2 V and negligible internal resistance are connected to resistors of resistance 9.0 Ω and 18 Ω as shown. [circuit diagram: two cells 3.0 V and 1.2 V in series in the top branch, a 9.0 Ω resistor in the middle branch with current I labelled, and an 18 Ω resistor in the bottom branch] What is the current I in the 9.0 Ω resistor?

1. A0.10 A
2. B0.20 A
3. C0.30 A
4. D0.47 A

As printed in the paper