A road tanker is connected to the ground by a metal wire before fuel is pumped out of it. Why is this metal wire used?
It keeps the fuel cool, so that less of the fuel evaporates
It lets charge flow to earth, so that a spark is less likely
It holds the tanker still while the fuel is being pumped out
It charges the tanker up, so that the fuel flows out faster
40 exam-style questions on AQA GCSE Physics 2.5 Static electricity, covering 2.5.1 Static charge and 2.5.2 Electric fields. Each one has a worked solution and a mark scheme showing where the marks go.