A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2018 · Q371 Mark

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

AThe charge flowing in an electric circuit is conserved.

BThe energy in an electric circuit is conserved.

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.

DThe sum of the potential differences in a circuit is equal to the sum of the products of the current and resistance.

✓ Correct answer

B: The energy in an electric circuit is conserved.

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2018 Paper 1 Variant 2, question 37.

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