Answers to AQA GCSE Thermistors and Light Dependent Resistors(Physics)
Practice Question
1.Describe how the graph for the thermistor and light dependent resistor are similar
Both graphs show an inversely proportional relationship. So, as either the temperature or the light intensity increase, then the resistance will decrease.
2. Draw a graph of resistance vs 1/temperature for a thermistor
3. Draw a circuit to show how a thermistor can be used to switch on an air conditioning unit when the room temperature becomes too high.
As temperature of the room will increase, resistance of the thermistor decreases, allowing a current to flow through the airconditioner to switch it on.
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