Question

A transistor with $\beta$ value equal to $80$ has a change of $250$$\mu A$ in base current. Then the change in collector current is

• A. $2$ $\mu A$
• B. $20mA$
• C. $2mA$
• D. $20$ $\mu A$

Answer 1

Answer: (B)

$20mA$

Given that:
$\beta =80$
$I_b=250\mu A=250\times {10}^{-3}mA$
The current gain is
$\beta =\frac{I_c}{I_c}$

$I_c=\beta \times I_b$

$I_c=80\times 250\times {10}^{-3}$

$I_c=20000\times {10}^{-3}=20mA$