Q. If $\beta,\ R_{L}$ and $r$ are the ac current gain, load resistance and the input resistance of a transistor respectively in CE configuration, the voltage and the power gains respectively are
A) $\beta\frac{R_{L}}{r}$ and $\beta^{2}\frac{R_{L}}{r}$
B) $\beta\frac{r}{R_{L}}$ and $\beta^{2}\frac{r}{R_{L}}$
C) $\beta\frac{R_{L}}{r}$ and $\beta\left( \frac{R_{L}}{r} \right)^{2}$
D) $\beta\frac{r}{R_{L}}$ and $\beta\left( \frac{r}{R_{L}} \right)^{2}$
Explanation
The correct answer is Option A: $\beta\frac{R_{L}}{r}$ and $\beta^{2}\frac{R_{L}}{r}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.