A battery with negligible internal resistance is linked to three resistors, as illustrated. The potential difference across every resistor is $2\,\text{V}$. The current supplied by the battery is $0.4\,\text{A}$, and the current through one of the resistors in parallel is $0.3\,\text{A}$. What is the current through the other resistor in parallel, and what is the electromotive force (e.m.f.) of the battery?
Physics 9702 · AS & A Level · Kirchhoff's laws