The resistance of light dependant resistance LDR:
Correct answer: B. Decreases with light
- A. Increases with light
- B. Decreases with light
- C. Decreases with darkness
- D. None of the above
Explanation
The correct answer is that the resistance of a Light Dependent Resistor (LDR) decreases with an increase in light intensity. This is because LDRs are designed to be sensitive to light, thus reducing their resistance as they are exposed to more light. Option A is incorrect because it states the opposite of what actually happens. Option C is misleading as it incorrectly suggests that resistance decreases in darkness, whereas it actually increases. Option D is incorrect as there is a correct statement among the options provided.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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