A-LevelPhysicsD.C. circuitsMay/June 2013Paper 1 Q331 Mark
A low-voltage supply with an e.m.f. of 20 V and an internal resistance of 1.5 Ω is used to supply power to a heater of resistance 6.5 Ω in a fish tank. What is the power supplied to the water in the fish tank?
A41 W
B50 W
C53 W
D62 W
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The correct answer is A. 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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