Question

In a transistor $(\beta =50)$ the voltage $5k\Omega$ load resistance in collector circuit is $5V$. The base current is.

• A. $0.02mA$
• B. $0.03mA$
• C. $0.08mA$
• D. $0.09mA$

Answer 1

The correct option is A $0.02mA$

Given,

$\beta =50$

$R_C=5k\Omega$

$V_C=5V$

Collector voltage, $V_C=I_C{R}_C$

$I_C=\frac{V_C}{R_C}=\frac{5}{5\times {10}^3}=1mA$

Base current, $I_B=\frac{I_C}{\beta }=\frac{1mA}{50}=0.02mA$

The correct option is A.