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BPSC 65th Re Prelims Exam 17 Feb 2020 Solved Paper

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Question : 5

Total: 150

In the context of LED (Light Emitting Diode ), which statement is false?

LED light consumes green energy
LEDs work for longer periods of light.
Mercury is used in LED, which is harmful to humans.
LED is to be used in traffic signal lights.
None of the above/More than one of the above

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