Q. The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
A) current in p-type > current in n-type.
B) current in n-type > current in p-type.
C) No current will flow in p-type, current will only flow in n-type.
D) current in n-type = current in p-type.
Explanation
[Solution] Electrons have higher mobility than holes, so for equal carrier concentrations the n-type current is larger. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.