An NTC thermistor is used in an incubator temperature-monitoring system.
Part of the circuit is shown in the diagram below.
The temperature of the incubator decreases. What happens to the potential difference across the thermistor and the current through it? Explain your answer.
What is the resistance of the thermistor when the potential difference across it is 5 V? Show your working or give a reason for your answer.
Calculate the current through the thermistor when the resistance of the thermistor is 1800 Ω.
Give your answer to 2 significant figures.
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.