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An amplifier has a voltage gain of 100 V/V and a current gain of 1000A/A. the value of the power gain decibel is

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An amplifier has a voltage gain of 100 V/V and a current gain of 1000A/A. the value of the power gain decibel is

(a) 30 db

(b) 40 db

(c) 50 db

(d) 60 db

I have been asked this question in an international level competition.

The query is from Amplifiers topic in portion Signals and Amplifiers of Electronic Devices & Circuits

1 Answer

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Correct answer is (c) 50 db

To explain I would say: Power gain in db is given by 10 log (100 X 1000) db.

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