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this is due the action of the photo transducer.when the light falls on the swtich, suddenly the resistance decreases.and the switch is closed.

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15y ago
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5mo ago

A light sensitive switch, also known as a photoresistor or photocell, is an electronic component that changes its resistance depending on the amount of light it is exposed to. When the light level changes, the resistance of the photoresistor changes, causing it to switch the circuit on or off. This is commonly used in applications such as street lighting, security systems, and camera exposure control.

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Q: What is a light sensitive switch?
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