Two identical fixed resistors are connected in series across a constant supply. A third identical resistor is added in series. How do the current and the voltage across each original resistor change?
Both become 32\frac{3}{2}23 of their original values
Current becomes 23\frac{2}{3}32; voltage remains unchanged
Current remains unchanged; voltage becomes 23\frac{2}{3}32
Both become 23\frac{2}{3}32 of their original values
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.