A student connects a 12 Ω resistor and a variable resistor in series with a 9.0 V supply. The student changes the resistance of the variable resistor.
Calculate the potential difference across the 12 Ω resistor when the variable resistor is set to 6.0 Ω.
The resistance of the variable resistor is then increased to 15 Ω.
Explain the effect on the potential difference across the 12 Ω resistor. Your answer should include a calculation.
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.