Let np and ne be the number of holes and conduction electrons respectively in a semiconductor. Then

Question

Let np and ne be the number of holes and conduction electrons respectively in a semiconductor. Then (A) np>ne in an intrinsic semiconductor (B) np=ne in an extrinsic semiconductor (C) np=ne in an intrinsic semiconductor (D) ne>np in an intrinsic semiconductor

Tardigrade Admin · Accepted Answer

In intrinsic semiconductors, the creation or liberation of one free electron by the thermal energy creates one hole simultaneously. Thus, in intrinsic semiconductors ne=nh.

Q. Let $n_{p}$ and $n_{e}$ be the number of holes and conduction electrons respectively in a semiconductor. Then

$n_{p} > n_{e}$ in an intrinsic semiconductor

$n_{p} = n_{e}$ in an extrinsic semiconductor

$n_{p} = n_{e}$ in an intrinsic semiconductor

$n_{e} > n_{p}$ in an intrinsic semiconductor

In intrinsic semiconductors, the creation or liberation of one free electron by the thermal energy creates one hole simultaneously. Thus, in intrinsic semiconductors $n_{e} = n_{h}$ .

Q. Let np​ and ne​ be the number of holes and conduction electrons respectively in a semiconductor. Then

np​>ne​ in an intrinsic semiconductor

np​=ne​ in an extrinsic semiconductor

np​=ne​ in an intrinsic semiconductor

ne​>np​ in an intrinsic semiconductor