A-LevelPhysicsD.C. circuits9702/12 · May/June 2013 · 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

✓ Correct answer

A: 41 W

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2013 Paper 1 Variant 2, question 33.

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