A student investigated how the current in a fixed wire resistor R R\,R at constant temperature varied with the potential difference across it.
Describe a method that the student could use to obtain a range of positive and negative values of current and potential difference for resistor RRR.
During another student's investigation, the current was left on for too long, causing the temperature of resistor R R\,R to increase. Explain how this increased temperature would have affected the student's results.
The figure below shows the scale of an analogue voltmeter used in the investigation.
What is the resolution of this voltmeter?
The student replaced the analogue voltmeter with a digital voltmeter. State one advantage of using a digital voltmeter rather than an analogue voltmeter, other than having a higher resolution.
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.