PHYS - Thermistor and LDR
Physics, electricity, resistance, thermistor, LDR - IBDP | DSE | GCE | IAL | AP Physics
Frequently asked in IGCSE Physics are questions on experiments using thermistor and light-dependent resistor.
- Resistance of thermistor decreases as temperature increases.
- Can be used as temperature sensors
In an electric circuit, the thermistor symbol looks like this:
Designing Experiments to Study the Relationship Between Temperature and Resistance of a Thermistor
If you plot the resistance-temperature graph, it will look something like this...
- Resistance of LDR decreases as light intensity increases.
- Can be used in street lamps
The LDR symbol looks like this in an electric circuit:
Designing Experiments to Study the Relationship Between Light Intensity and Resistance of LDR
If you plot the resistance-light intensity graph, it will look like this:
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