Physics (AS & A Level) · Oct / Nov 2016 · Paper 12 · Question 34
The diagram shows an electric circuit in which the resistance of the external resistor is 2R and the internal resistance of the source is R. What is the ratio \frac{\text{power in internal resistance}}{\text{power in external resistor}}?
- A\frac{1}{4}
- B\frac{1}{2}
- C2
- D4
As printed in the paper
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Correct answer: B. \frac{1}{2}
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