Edexcel IGCSE Physics · Spec 2.8-2.9
Resistance, LDRs & Thermistors
How the resistance of LDRs and thermistors changes with light and temperature.
Physics revision video
Resistance, LDRs & Thermistors
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Spec 2.8-2.9
What you need to know
- Describe how a wire's length affects its resistance
- Describe how an LDR responds to light
- Describe how a thermistor responds to temperature
Active recall
Quick check
Answer each question before opening the answer.
How does an LDR's resistance change with light?
Its resistance decreases as the light intensity increases.
How does a thermistor's resistance change with temperature?
Its resistance decreases as the temperature increases.
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