Q. The current gain of a transistor in common base mode is 0.995. the current gain of the same transistor in common emitter mode is
A) 197
B) 201
C) 198
D) 199
Explanation
(d) $\beta = \frac{\alpha}{1 - \alpha} = \frac{0.995}{1 - 0.995} = \frac{0.995}{0.005} = 199$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.