Resistors: Thermistors & LDR's (AQA GCSE Physics): Flashcards
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13 cards from this deck
How does thermistor resistance change as temperature increases?
How does thermistor resistance change as temperature increases?
Decreases
What does LDR stand for?
What does LDR stand for?
Light-Dependent Resistor
How does LDR resistance change as light intensity increases?
How does LDR resistance change as light intensity increases?
Decreases
Circuits using thermistors and LDRs
Circuits using thermistors and LDRs
Sensing circuits
What thermistors/LDRs do in sensing circuits
What thermistors/LDRs do in sensing circuits
Vary resistance across another component
What might a thermistor switch on when it's cold?
What might a thermistor switch on when it's cold?
Heater
What might a thermistor activate when it's hot?
What might a thermistor activate when it's hot?
Fan
LDR resistance in dark conditions
LDR resistance in dark conditions
High
LDR resistance in bright light
LDR resistance in bright light
Low
Bulb PD when LDR resistance is high (in sensing circuit)
Bulb PD when LDR resistance is high (in sensing circuit)
High
Bulb PD when LDR resistance is low (in sensing circuit)
Bulb PD when LDR resistance is low (in sensing circuit)
Low
Bulb brightness when LDR resistance is high (dark)
Bulb brightness when LDR resistance is high (dark)
Brighter
Bulb brightness when LDR resistance is low (bright)
Bulb brightness when LDR resistance is low (bright)
Dimmer