A robotic trolley takes part in an 80 s test. It climbs a slope for 40 s of this time, when the current in its motor is 0.90 A, and then moves on level ground with a different steady current.
A total charge of 48 C passes through the motor during the test.
What is the current in the motor while the trolley moves on level ground?
0.15 A0.15\ \mathrm{A}0.15 A
0.60 A0.60\ \mathrm{A}0.60 A
1.2 A1.2\ \mathrm{A}1.2 A
0.30 A0.30\ \mathrm{A}0.30 A
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.