A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2022 · Q321 Mark

The diagrams show two different circuits. [Figure showing two circuits: left with one resistor R, right with two resistors R in parallel connected in series with a third R] The cells in each circuit have the same electromotive force (e.m.f.) and negligible internal resistance. The three resistors each have the same resistance R. In the circuit on the left, the power dissipated in the resistor is P. What is the total power dissipated in the circuit on the right?

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AP/4

BP/2

D2P

✓ Correct answer

B: P/2

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2022 Paper 1 Variant 2, question 32.

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