A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2017 · Q371 Mark

A potential divider consists of two resistors of resistances R₁ and R₂ connected in series across a source of potential difference (p.d.) Vᵢₙ. The p.d. across R₁ is Vout. [Figure showing a potential divider circuit with Vᵢₙ across R₁ and R₂ in series, and Vout across R₁] Which changes to R₁ and to R₂ will increase the value of Vout?

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AR₁: doubled, R₂: doubled

BR₁: doubled, R₂: halved

CR₁: halved, R₂: doubled

DR₁: halved, R₂: halved

✓ Correct answer

B: R₁: doubled, R₂: halved

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2017 Paper 1 Variant 2, question 37.

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