LDRs and thermistors (AQA GCSE Physics): Quizzes
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12 questions from this quiz
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Practise the questions
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 has high resistance
What happens to an LDR's resistance in bright light?
What happens to an LDR's resistance in bright light?
It has low resistance
Which common application uses LDRs?
Which common application uses LDRs?
Automatic street lights
What does NTC stand for in thermistor terminology?
What does NTC stand for in thermistor terminology?
Negative Temperature Coefficient
What is a thermistor's resistance when it is cold?
What is a thermistor's resistance when it is cold?
High resistance
What happens to a thermistor's resistance as temperature increases?
What happens to a thermistor's resistance as temperature increases?
Resistance decreases
Which application commonly uses thermistors?
Which application commonly uses thermistors?
Fire alarms
What pattern applies to both LDRs and thermistors?
What pattern applies to both LDRs and thermistors?
Stimulus UP = Resistance DOWN
In the worked example, what is the LDR resistance in darkness?
In the worked example, what is the LDR resistance in darkness?
In the worked example, what is the thermistor resistance at ?
In the worked example, what is the thermistor resistance at ?
Why connect a voltmeter across an LDR or thermistor?
Why connect a voltmeter across an LDR or thermistor?
To observe voltage drop changes