A-LevelPhysicsD.C. circuitsMay/June 2016Paper 1 Q361 Mark
A potential divider circuit is formed by connecting a battery of negligible internal resistance in series with two variable resistors, as shown. [Figure 36.1] The variable resistors have resistances Rx and Ry. Vx is the potential difference across resistance Rx. Rx and Ry are both changed at the same time. Which combination of changes must cause Vx to increase?
ARx: larger, Ry: larger
BRx: larger, Ry: smaller
CRx: smaller, Ry: larger
DRx: smaller, Ry: smaller
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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