Physics (AS & A Level) · Oct / Nov 2017 · Paper 13 · Question 38

In each arrangement of resistors, the ammeter has a resistance of 2 Ω. Which arrangement gives the largest reading on the ammeter when the same potential difference is applied between points P and Q?

1. A1 Ω and 2 Ω in series with ammeter between P and Q
2. B1 Ω and 2 Ω in parallel with ammeter between P and Q
3. C1 Ω in series with ammeter, in parallel with 2 Ω between P and Q
4. D1 Ω and 2 Ω in parallel with ammeter in the middle branch between P and Q

As printed in the paper