A fixed resistor in a low-voltage gate-sensor circuit has a potential difference of 3.0 V across it when the current through it is 0.15 A. The circuit is then redesigned so that this resistor is connected in series with a 10 Ω resistor across a 9.0 V supply. The resistance of the fixed resistor does not change.
Calculate the current in the redesigned circuit.
81 exam-style questions on Edexcel GCSE Physics 10.2 Resistance, covering 10.2.1 Current in a circuit and conservation at junctions, 10.2.2 Resistance and variable resistors, 10.2.3 Series and parallel resistance, 10.2.4 I–V characteristics of components, and 10.2.5 LDRs and thermistors. Each one has a worked solution and a mark scheme showing where the marks go.