Question

In a common emitter transistor amplifier circuit $\beta =100$. Input resistance $R_1=1k\Omega$ out put resistance $R_2=10k\Omega$. The power gain is given by

• A. ${10}^3$
• B. ${10}^5$
• C. ${10}^6$
• D. ${10}^7$

Answer 1

The correct option is A ${10}^3$

In a common emitter transistor amplifier circuit, the power gain is-

$P_G={\beta }^2.\frac{R_{output}}{R_{input}}$

$P_G={\left(100\right)}^2\times \frac{1}{10}={10}^3$