Assertion :A photocell is called an electric eye. Reason: When light is incident on some semiconductor its electrical resistance is reduced

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Photoconductive cell is based on the principle that when light is incident on some semiconductor, its electrical resistance is reduced. Such cells are used in solar batteries.
Whereas photocell is used in electronic devices for giving theft warning in banks, when thief lights a torch on cash, the photocells sense it and ring the bell. Thus it is called an electric eye.

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