Exam-style question
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How does the resistance of an LDR change with varying light intensity, and how does this affect the output voltage in a potential divider circuit?.
Model answer
What a good answer should say
- The resistance of an LDR decreases as light intensity increases.
- In a potential divider circuit, this decrease in resistance leads to a higher output voltage across the LDR when light intensity is high, as less voltage is dropped across the other resistor.
Explanation
Why this works
This answer is strong because it clearly explains the relationship between light intensity and resistance in an LDR, and how this affects the output voltage in a potential divider circuit. The question tests understanding of the behavior of LDRs in circuits.
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