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The unit of gain is ________

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The unit of gain is ________

(a) Joules

(b) Decibels

(c) Its unit less

(d) Watts

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Question is from Active and Passive Devices topic in division Diode Circuit of Analog Circuits

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Right option is (c) Its unit less

Explanation: Gain is the ratio of same type of values i.e. either volt/volt or current(amp)/current(amp) or watts/watts thus this makes it unit less. If it is expressed in decibels i.e. on a logarithmic scale, then they have the unit dB.

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