The type of impurity that has to be added to a semiconductor material so that it can provideholes is
Correct answer: A. trivalent.
- A. trivalent.
- B. tetravalent.
- C. pentavalent.
- D. monovalent.
Explanation
The type of impurity that needs to be added to a semiconductor material to provide holes is A) trivalent.Explanation:When a trivalent impurity (like Boron, Aluminum, or Gallium) is added to a pure semiconductor (like Silicon or Germanium), it creates a "hole" in the crystal lattice. This is because trivalent atoms have only three valence electrons, while the semiconductor atoms have four. This deficiency of an electron creates a positive "hole" which can then act as a charge carrier, leading to p-type semiconductors.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
Practise Electronics
660 free Electronics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More PN Junction questions
If in a transistor both collector-base and base-emitter junctions are reversed biased then it is:
A potential barrier of 0.7 volt exists across P- N junction made from:
The potential difference across the silicon PN junction is:
In the AND gate truth table, the output become low (1), when
The CORRECT symbol of a n-p-n transistor is(Note: Where 'E', 'B' and 'C' have their usual meaning.)
The output of AND gate will be 1 when