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Question: Answered & Verified by Expert
An amplifier has a voltage gain $A_V=1000$. The voltage gain in $\mathrm{dB}$ is
PhysicsWaves and SoundAIIMSAIIMS 2006
Options:
  • A $30 \mathrm{~dB}$
  • B $60 \mathrm{~dB}$
  • C $3 \mathrm{~dB}$
  • D $20 \mathrm{~dB}$.
Solution:
2235 Upvotes Verified Answer
The correct answer is: $60 \mathrm{~dB}$
$$
\begin{aligned}
\text { : Voltage gain in } \mathrm{dB} & =20 \log _{10} A_V \\
& =20 \log _{10}(1000)=60 \mathrm{~dB} .
\end{aligned}
$$

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