Question

In a transistor in $CE$ configuration, the ratio of power gain to voltage gain is

• A. $\alpha$
• B. $\beta /\alpha$
• C. $\beta \alpha$
• D. $\beta$

Answer 1

Answer: (D)

For $CE$ configuration voltage gain $=\beta \times R_L/R_i$
Power gain $={\beta }^2\times R_L/R_i$
$\Rightarrow \frac{\text{ Power gain }}{\text{ Voltage gain }}=\beta$