Question

A $\text{PNP}$ in common emitter configuration used as an amplifier, its current gain is $50$. If input resistance is $1k\Omega$ and input voltage is $5\text{V}$ , then output current will be-

• A. $250\text{mA}$
• B. $30\text{mA}$
• C. $50\text{mA}$
• D. $100\text{mA}$

Answer 1

The correct option is A $250\text{mA}$

Given,

$R_B=1k\Omega ;V_B=5\text{V};\beta =50$

From Ohm's law, $V=IR$

$I_B=\frac{V_B}{R_B}=5\times {10}^{-3}\text{A}\text{(or)}$

$I_B=5\text{mA}$

$I_C=\beta I_B=50\times 5\times {10}^{-3}=250\text{mA}$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(A\right)$ is the correct answer.