A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2016 · Q341 Mark

Three cells with e.m.f.s V₁, V₂ and V₃, have negligible internal resistance. These cells are connected to three resistors with resistances R₁, R₂ and R₃, as shown. [Figure 34.1] The current in the circuit is I. Which equation is correct?

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AV₁ + V₂ + V₃ = I(R₁ + R₂ + R₃)

BV₁ + V₂ - V₃ = I(R₁ + R₂ + R₃)

CV₁ - V₂ + V₃ = I(R₁ + R₂ + R₃)

DV₁ - V₂ - V₃ = I(R₁ + R₂ + R₃)

✓ Correct answer

D: V₁ - V₂ - V₃ = I(R₁ + R₂ + R₃)

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2016 Paper 1 Variant 2, question 34.

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