LDRs and thermistors (AQA GCSE Physics Combined Science): Quizzes
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12 questions from this quiz
What does LDR stand for?
What does LDR stand for?
Light-Dependent Resistor
What happens to an LDR's resistance in the dark?
What happens to an LDR's resistance in the dark?
It becomes very high
What happens to an LDR's resistance in bright light?
What happens to an LDR's resistance in bright light?
It becomes much lower
What is the relationship between brightness and LDR resistance?
What is the relationship between brightness and LDR resistance?
Brightness up, resistance down
Which of these uses an LDR?
Which of these uses an LDR?
Street lights that turn on at night
What does the word 'thermistor' mean?
What does the word 'thermistor' mean?
Thermal resistor
What happens to a thermistor's resistance when it gets hot?
What happens to a thermistor's resistance when it gets hot?
It becomes lower
What happens to a thermistor's resistance when it is cold?
What happens to a thermistor's resistance when it is cold?
Resistance is high
Which device commonly uses a thermistor?
Which device commonly uses a thermistor?
Thermostat for heating systems
In bright light, what happens to current in an LDR circuit?
In bright light, what happens to current in an LDR circuit?
More current flows
At high temperatures, what happens to current in a thermistor circuit?
At high temperatures, what happens to current in a thermistor circuit?
More current flows
How do LDRs and thermistors change their resistance?
How do LDRs and thermistors change their resistance?
Smoothly and continuously