A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2018 · Q361 Mark

A potential divider circuit is constructed with one variable resistor X and one fixed resistor Y, as shown. [Figure 36.1] The potential difference across resistor X is Vₓ and the potential difference of resistor Y is Vᵧ. As the resistance of X is increased, what happens to Vₓ and to Vᵧ?

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AVₓ: falls, Vᵧ: rises

BVₓ: falls, Vᵧ: stays the same

CVₓ: rises, Vᵧ: falls

DVₓ: rises, Vᵧ: stays the same

✓ Correct answer

C: Vₓ: rises, Vᵧ: falls

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2018 Paper 1 Variant 2, question 36.

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