A toy car has a motor and a headlamp connected in series with a battery. While the car runs, a charge of 15 C passes through each component. The headlamp transfers 27 J and the motor transfers 63 J of energy.
Calculate the potential difference of the battery.
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.