An engineer investigated how the current in a high-power filament heating element varied with the potential difference across it.
Write down the equation which links current (III), potential difference (VVV), and resistance (RRR).
Use the graph to determine the resistance of the filament heating element when the potential difference across it is 8.0 V8.0\text{ V}8.0 V.
Describe and explain how the resistance of the filament heating element changes as the potential difference across it increases from 0 V0\text{ V}0 V to 10 V10\text{ V}10 V.
Current, potential difference and resistance Questions
Practise AQA GCSE Physics Current, potential difference and resistance with exam-style questions for Foundation and Higher tier. 82 questions covering Standard circuit diagram symbols, Electrical charge and current, Current, resistance and potential difference, and Resistors, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.