Question

Let np and ne be the number of holes and conduction electrons in an intrinsic semiconductor.
(a) np > ne
(b) np = ne
(c) np < ne
(d) np ≠ ne

Answer 1

We need to tell the relation between the number of holes and the number of conduction electrons in an intrinsic semiconductor.

• In an intrinsic semiconductor, the number of electrons generated in the conduction band is equal to the number of holes generated in the valence band.

• Actually, the holes in the intrinsic semiconductor are formed by the absence of the electrons from their place. The electrons after getting thermally excited migrate from their places to new ones, thus creating holes in the vacant places. Thus, the number of holes and number of conduction electrons is equal.
• The correct answer is option (b) np=ne

Answer 2

np = ne is the correct option.

Explanation:

• Semiconductors are the compounds that can conduct electricity but their conduction isn't like conductors  

• In the intrinsic Semiconductors, there's no need to put some impurities to make a Semiconductor unlike extrinsic Semiconductors.

• The Semiconductors can conduct electricity because of the transfer of the electrons from valance band to conduction band because of some sort of excitation.

• So as the conduction band electrons are filled up, equal number of holes are created in the valance band.

• So the np = ne.

For more information about intrinsic Semiconductors,

https://brainly.in/question/1877695

When impurities is doped into an intrinsic semiconductors the conductivity of a semiconductor will increase decrease or remain the same or become zero

https://brainly.in/question/10477657

What are the properties of intrinsic semiconductor? - Brainly.in