Assertion :In street light circuits, photo-cells are used to switch on and off the lights automatically at dusk and dawn. Reason: A photocell can convert a change in intensity of illumination into a change in photocurrent that can be used to control lighting system.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Photocells are light sensitive sensors that respond to the amount of light detected.

When the light is too low, the sensor informs the unit within the streetlight to activate the flow of electricity. When the photocell detects too much light it tells to deactivate electricity,

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