Physics (AS & A Level) · Oct / Nov 2020 · Paper 13 · Question 35

A metal cube has a resistance of 4.0 Ω between opposite faces. Ten of these cubes are put together to make a cuboid of 1 × 2 × 5 cubes. There is no extra resistance where the faces of the cubes touch each other. What is the resistance of the cuboid when connected between faces X and Y?

1. A1.6 Ω
2. B2.0 Ω
3. C10 Ω
4. D40 Ω

As printed in the paper