A tag consumes electrical power continuously at 0.16 W. It is powered by a fully charged cell with a usable charge capacity of 9000 C. Assume that the cell maintains a constant voltage of 3.2 V until it is fully discharged.
What is the maximum continuous operating time of the tag before the cell is fully discharged?
15 hours15\text{ hours}15 hours
30 hours30\text{ hours}30 hours
50 hours50\text{ hours}50 hours
80 hours80\text{ hours}80 hours
36 exam-style questions on AQA A Level Physics Current electricity, covering Basics of electricity, Current-voltage characteristics, Resistivity, Circuits, Potential divider, and Electromotive force and internal resistance. Each one has a worked solution and a mark scheme showing where the marks go.