A-LevelPhysicsD.C. circuitsOct/Nov 2021Paper 1 Q341 Mark
A battery of electromotive force (e.m.f.) 10 V and internal resistance 5.0 Ω is connected to a 5.0 Ω load resistor. [Figure 34.1] Which change occurs when the 5.0 Ω load resistor is replaced with a 50 Ω load resistor?
AThe current in the circuit increases.
BThe potential difference across the load resistor increases.
CThe power dissipated in the internal resistance of the battery increases.
DThe total power dissipated in the circuit increases.
✓ 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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