photocell used as an
1. Recorder
2. Detector
3. Amplifier
4. light source
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They are used as a light source.
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Answer:
4. light source
Explanation:
Photocells are used in automatic lights to activate whenever it gets dark, and the activation/deactivation of streetlights mainly depends on the day whether it is day or night. These are used as timers in a running race to calculate the runner's speed. Photocells are used to count the vehicles on the road.
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