Several cylindrical copper rods are manufactured. Two different lengths of rod are available, and each length is available in two different diameters.
Which rod has the lowest electrical resistance?
the rod with the longer length and the larger diameter
the rod with the longer length and the smaller diameter
the rod with the shorter length and the larger diameter
the rod with the shorter length and the smaller diameter
132 exam-style questions on CIE IGCSE Physics 4.2.4a Resistance. Each one has a worked solution and a mark scheme showing where the marks go.