A fixed resistor and a variable resistor are connected in series across a constant potential difference. The slider is moved to include a longer length of resistance wire. What happens?
Total resistance decreases and current decreases
Total resistance increases and current increases
Total resistance increases and current decreases
Total resistance decreases and current increases
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.