Q. Current gain $\beta_{AC}$ common emitter mode of transistor is
A) $\beta_{AC} = \left( \frac{\mathrm{\Delta}I_{C}}{\mathrm{\Delta}I_{B}} \right),\ V_{C} = constant$
B) $\beta_{AC} = \left( \frac{\mathrm{\Delta}I_{B}}{\mathrm{\Delta}I_{C}} \right),\ V_{C} = constant$
C) $\beta_{AC} = \left( \frac{\mathrm{\Delta}I_{C}}{\mathrm{\Delta}I_{E}} \right),\ V_{C} = constant$
D) $\beta_{AC} = \left( \frac{\mathrm{\Delta}I_{E}}{\mathrm{\Delta}I_{C}} \right),\ V_{C} = constant$
Explanation
The correct answer is Option A: $\beta_{AC} = \left( \frac{\mathrm{\Delta}I_{C}}{\mathrm{\Delta}I_{B}} \right),\ V_{C} = constant$.
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.