Question

In a transistor circuit shown in figure, if the base current is $35\mu A$, then the value of resistor $R_b$ is

• A. $257k\Omega$
• B. $123.5k\Omega$
• C. $380.05k\Omega$
• D. None of these

Answer 1

The correct option is A $257k\Omega$

By using, $V_b=i_b{R}_b$
$R_b=\frac{V_b}{i_b}=\frac{9}{35\times {10}^{-6}}=257k\Omega$.