Physics (AS & A Level) · Oct / Nov 2016 · Paper 13 · Question 36
In the circuit shown, the reading on the ammeter is zero. The four resistors have different resistances R1, R2, R3 and R4. Which equation is correct?
- AR1 – R3 = R2 – R4
- BR1 × R3 = R2 × R4
- CR1 – R4 = R2 – R3
- DR1 × R4 = R2 × R3
As printed in the paper
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Correct answer: D. R1 × R4 = R2 × R3
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