Spec 1PH0
Revise Edexcel GCSE Physics 10.2.2 Resistance and variable resistors with the question bank and revision guides.
Explain how changing the resistance in a circuit changes the current and how this can be achieved using a variable resistor. • Recall and use the equation: potential difference (volt, V) = current (ampere, A) × resistance (ohm, Ω); V = I × R.
