Physics (AS & A Level) · May / June 2021 · Paper 12 · Question 37

A cell of electromotive force (e.m.f.) E and negligible internal resistance is connected to a circuit. The circuit has currents I₁, I₂ and I₃, and potential differences V₁, V₂ and V₃, as shown. Which equation represents a statement of Kirchhoff's first law?

1. AI₁ = I₂ + I₃
2. BI₁ = I₂ = I₃
3. CE = V₁ + V₂
4. DV₁ = V₂ = V₃

As printed in the paper