A test actuator works from a constant potential difference of 12.0 V. In one 60 s service cycle it runs at a current of 0.30 A for the first 25 s, is then switched off for 15 s, and runs at a different constant current for the rest of the cycle. The actuator transfers a total of 270 J of energy during the cycle.
Calculate the current in the actuator during the final stage of the cycle.
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.