Physics (AS & A Level) · Oct / Nov 2021 · Paper 11 · Question 33
A circuit contains two resistors, P and Q, and a power supply of negligible internal resistance, as shown. The current in resistor P is 2.0 A and the power dissipated by resistor P is 18 W. Resistor Q dissipates 240 J of energy when a charge of 40 C passes through it. What is the electromotive force (e.m.f.) of the power supply?
- A3.0 V
- B6.0 V
- C9.0 V
- D15 V
As printed in the paper
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Correct answer: D. 15 V
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