During a violent atmospheric discharge (a lightning strike), a net quantity of electric charge, QQQ, transfers from a storm cloud to the ground over a time interval, Δt\Delta tΔt, establishing an average electrical current, III.
State the equation that expresses Q Q\,Q in terms of I I\,I and Δt\Delta tΔt.
32 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.