Some Components Can Change Resistance Flashcards
1
Q
What is an LDR?
A
A special type of resistor that change its resistance depending on how much light falls on it
2
Q
What does LDR stand for?
A
Light dependent resistor
3
Q
What happens to the resistance when in bright light?
A
The resistance falls
4
Q
What happens to the resistance when in darkness?
A
The resistance is highest
5
Q
What does this make it a useful device for? (LDR)
A
Various electronic circuits e.g burglar detector
6
Q
What is a thermistor?
A
A temperature-dependent resistor
7
Q
What happens to the thermistor in hot conditions?
A
The resistance drops
8
Q
What happens to the thermistor in cold conditions?
A
The resistance goes up
9
Q
Thermistors make useful?
A
Temperature detectors e.g car engine temperature sensors, thermostats and fire alarms
