A student has a 6.0 V supply and two identical 20 Ω resistors. With one resistor connected to the supply, the measured current is 0.30 A. The supply must not provide more than 0.40 A when both resistors are used.
Calculate the current when the two resistors are connected in series with the supply.
Explain which arrangement the student should use to keep the current from the supply within its limit.
94 exam-style questions on AQA GCSE Physics 2.2 Series and parallel circuits, covering 2.2 Series and parallel circuits. Each one has a worked solution and a mark scheme showing where the marks go.