A-LevelPhysicsD.C. circuits9702/12 · May/June 2019 · Q361 Mark

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?

Acharge

Benergy

Cmass

Dmomentum

✓ Correct answer

A: charge

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 36.

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