Q. n-p-n transistor are preferred to p-n-p transistor because they have
A) Low cost
B) Low dissipation energy
C) Capability of handling large power
D) Electrons having high mobility than holes
Explanation
(d) n-p-n transistor is formed by combining two $n$-types crystals between which a thin $p$-type crystal is there. Electrons are charge carriers within the n-p-n transistor whereas holes are charge carriers within the p-n-p transistor. Since, electrons move more easily than holes, hence n-p-n transistors are preferred compared to p-n-p.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.