Physics (AS & A Level) · Oct / Nov 2018 · Paper 12 · Question 37

Kirchhoff's second law is a consequence of a basic principle. What is this principle?

1. AThe charge flowing in an electric circuit is conserved.
2. BThe energy in an electric circuit is conserved.
3. CThe sum of the electric currents entering a point in an electrical circuit is equal to the sum of the electric currents leaving that point.
4. DThe sum of the potential differences in a circuit is equal to the sum of the products of the current and resistance.

As printed in the paper