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An amplifier has a voltage gain A(V)=100...

An amplifier has a voltage gain `A_(V)=1000`. The voltage gain in `dB` is

A

`20 dB`

B

`60 dB`

C

`3dB`

D

`30 dB`

Text Solution

Verified by Experts

The correct Answer is:
D
Voltage gain, `A_(v)=1000`
In `dB`, voltage gain
`A=10 log_(10)1000 dB=(10xx3)log_(10)10 dB`
`=30 ( :' log_(10) 10=1)`
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