Q. While a collector to emitter voltage is constant in a transistor, the collector current changes by $8.2\ mA$ when the emitter current changes by $8.3\ mA$. The value of forward current ratio $h_{fe}$ is
A) 82
B) 83
C) 8.2
D) 8.3
Explanation
(a) $h_{fe} = \left( \frac{\Delta i_{c}}{\Delta i_{b}} \right)_{V_{ce}} = \frac{8.2}{8.3 - 8.2} = 82$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.