A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2024 · Q351 Mark

The diagram shows a cell with internal resistance connected in parallel with a fixed resistor and a variable resistor. [Figure showing a circuit with a cell, fixed resistor, and variable resistor in parallel] The resistance of the variable resistor is decreased. What happens to the potential difference V across the variable resistor and the current I in the variable resistor?

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AV decreases, I increases

BV decreases, I decreases

CV increases, I decreases

DV increases, I increases

✓ Correct answer

B: V decreases, I decreases

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2024 Paper 1 Variant 2, question 35.

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