Q. If $D_{e}$ , $D_{b}$ and $D_{c}$ are the doping levels of emitter, base and collector respectively of a transistor, then
A) $D_{e}$ = $D_{b}$ = $D_{c}$
B) $D_{e}$ < $D_{b}$ = $D_{c}$
C) $D_{e}$ > $D_{b}$ > $D_{c}$
D) $D_{e}$ >${\ D}_{c}$ > $D_{b}$
Explanation
(d) In transistor emitter is heavily doped and base is lightly doped.
So, $D_{e}$ >${\ D}_{c}$ > $D_{b}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.