In a battery-powered ventilation unit, motors P, Q and R occupy three parallel branches.
A connecting lead becomes loose. Motors P and Q continue to operate, but motor R stops.
Which statement explains why the loose connection is in the branch containing motor R?
A break in one branch leaves the other branches working, so only that branch stops.
A break before the branches split stops only the branch furthest from the battery.
Motors P and Q use up the charge before it can reach motor R.
Current passes through P, then Q, then R, so motor R receives it last.
94 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.