An n-type semiconductor is
A. Positively charged
B. Negatively charged
C. Electrically neutral
D. None of the above
Answer: Option B
Solution (By Examveda Team)
An n-type semiconductor is a type of semiconductor material in which the majority charge carriers are electrons. These electrons are negatively charged. The term "n-type" stands for "negative type," indicating the predominant charge of the carriers.In an n-type semiconductor, impurities are intentionally added to introduce extra electrons into the crystal lattice, creating an excess of negative charge carriers. This leads to the conductivity of the material being primarily due to the movement of electrons.
Option A: Positively charged is not the correct answer as n-type semiconductors have an excess of negatively charged electrons, not positively charged carriers.
Option C: Electrically neutral is not the correct answer as n-type semiconductors have an excess of electrons and are not electrically neutral.
Option D: None of the above is not the correct answer as the correct answer is Option B: Negatively charged.
Given the options provided, the correct answer is Option B: Negatively charged.
This Question Belongs to Electrical Engineering >> Semiconductor Theory
It is electrically neutral.
The terms n- and p-type doped do only refer to the majority charge carriers.
Each positive or negative charge carrier belongs to a fixed negative or positive charged dopant and n type materials are NOT positively and negatively charged.
An n-type material by itself has mainly negative charge carriers (electrons) that are able to move freely, but it is still neutral because the fixed donor atoms, having donated electrons, are positive.
Similarly p-type material by itself has mainly positive charge carrier (holes) which are able to move relatively freely, but it is still neutral because the fixed acceptor atoms, having accepted electrons, are negative.
With the n- type material, electrons are majority charge carriers so it is expected to negatively charged