Question
Download Solution PDFWhich of the following is NOT a trivalent impurity?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF
Important Points:
- P-type semiconductor: The semiconductor having holes as majority charge carriers and electrons as a minority charge carrier is called as P-type semiconductor.
- Extrinsic N-Type Semiconductor is formed when a trivalent impurity is added to a pure semiconductor.
- Example of trivalent impurity are Boron, Gallium and Indium
- Trivalent impurity like boron, have 3 valence electrons
- Each atom of the impurity fits in the silicon crystal by forming covalent bonds with the surrounding silicon atoms
- The dopant boron atom has one less electron than surrounding silicon and thus vacancy is generated that acts as a hole.
N-type semiconductor: The semiconductor having electrons as majority charge carriers and holes as a minority charge carrier are called as N-type semiconductor.
- When pentavalent impurity is doped in intrinsic semiconductor then we got N-type semiconductor. For example: Arsenic, Phosphorus etc.
Last updated on Jul 11, 2025
-> All the aspiring candidates who wish to sit for the online examination scheduled for 15th July 2025, can download the ALP CBAT Admit Card using the direct link provided in the article.
-> RRB ALP Exam Date OUT. Railway Recruitment Board scheduled the RRB ALP Computer-based exam for 15th July 2025. Candidates can check out the Exam schedule PDF in the article.
-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> Bihar Home Guard Result 2025 has been released on the official website.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.
->The candidates must have passed 10th with ITI or Diploma to be eligible for this post.
->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.
-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways.
-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.
-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here