Physics (AS & A Level) · Oct / Nov 2020 · Paper 13 · Question 33

Two resistors R1 and R2 are made from wire of the same material. They are connected in parallel to each other in a circuit, as shown. The diameter of R2 is half the diameter of R1. The resistance of R2 is three times the resistance of R1. What is the value of the ratio (average drift speed of free electrons in R1)/(average drift speed of free electrons in R2)?

1. A3/2
2. B3/4
3. C1/6
4. D1/12

As printed in the paper