Question:
Photo conductive cells are made by:
Photo conductive cells are made by:
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Remember, photoconductive cells work by changing resistance when light is absorbed. Lead sulphide is commonly used in infrared light detection.
Updated On: Jun 24, 2025
- Lead sulphide
- Tin sulphide
- Zinc sulphide
- Magnesium sulphide
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The Correct Option is A
Solution and Explanation
Photoconductive cells are made using materials that change their electrical conductivity when exposed to light. Among the options, Lead sulphide (PbS) is commonly used to make photoconductive cells due to its properties of high photo-conductivity in the infrared range.
Other materials listed like Tin sulphide (SnS), Zinc sulphide (ZnS), and Magnesium sulphide (MgS) are not typically used for making photoconductive cells, although they have some semiconductor properties. The ideal photoconductive material needs to have a direct bandgap, which is why Lead sulphide is the most suitable for this application.
Thus, Lead sulphide is the correct answer.
Other materials listed like Tin sulphide (SnS), Zinc sulphide (ZnS), and Magnesium sulphide (MgS) are not typically used for making photoconductive cells, although they have some semiconductor properties. The ideal photoconductive material needs to have a direct bandgap, which is why Lead sulphide is the most suitable for this application.
Thus, Lead sulphide is the correct answer.
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