CAIE A-Level Physics AS 9.3.7 The Resistance of a Light Dependent Resistor Ldr Decreases Questions
Explain that the resistance of an LDR decreases as light intensity increases.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- AS
Exam points
- Explain that the resistance of an LDR decreases as light intensity increases.
CAIE A-Level Physics AS 9.3.7 The Resistance of a Light Dependent Resistor Ldr Decreases Questions question 1
[Maximum number: 1]
A car has sensors for detecting the light intensity and temperature of its environment.
The sensors make use of a light-dependent resistor (LDR) and a thermistor.
The car moves from a warm and dark environment into a cold and bright environment.
What are the changes to the resistances of the LDR and thermistor?
resistance
of LDR
resistance of
thermistor
increases
increases
increases
decreases
decreases
increases
decreases
decreases
C
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