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Digital Concepts

Q1: Which of the following is not an analog device?

A Thermocouple

B Current flow in a circuit

C Light switch

D Audio microphone

ANS:C - Light switch

A light switch is digital, it's either on or off. A dimmer switch is analog. You can adjust the amount of light by sliding the slider or turning the knob, depending on which type of dimmer switch you have.



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