Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 35

Kirchhoff's first law states that the sum of the currents entering a junction in a circuit is equal to the sum of the currents leaving it. The law is based on the conservation of a physical quantity. What is this physical quantity?

1. Acharge
2. Benergy
3. Cmass
4. Dmomentum

As printed in the paper