Video Tutorials and Resources
Prepare for A Level Physics
LDRs and Thermistors
The Light Dependent Resistor, LDR
These electrical components decrease their resistance when the light intensity increases.
This example asks you to read data from a graph to answer the question.
Thermistors (thermal resistors) change their resistance with temperature, the hotter it gets the lower the resistance.
In this example you need to read the graph to find the data needed for the equation.
LDRs and Thermistors in Circuits
The reason you should know about these components is because they can be used in sensing circuits, to change what happens if it gets too hot, cold, dark or light.
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