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Intrinsic and Extrinsic Semiconductors for JEE: 10 solved questions

Real JEE paper questions on intrinsic and extrinsic semiconductors, part of semiconductor electronics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2006 to 2025. No sign-in needed to read them.

What this topic asks

• Doping and carrier concentration — 6 questions
• Conductivity and mobility — 4 questions

All 10 questions with solutions

• Consider an n-type semiconductor in which nₑ and nₕ are number of electrons and holes, respectively. (A) Hole… JEE Main 4th April 2nd Shift 2025
• The acceptor level of a p-type semiconductor is 6 eV. The maximum wavelength of light which can create a hole… JEE Main 6th April 2nd Shift 2024
• Match List I with List II. List I: (A) Intrinsic semiconductor, (B) n-type semiconductor, (C) p-type semicond… JEE Main 1st Feb 1st Shift 2023
• The effect of increase in temperature on the number of electrons in conduction band (nₑ) and resistance of a… JEE Main 31st Jan 1st Shift 2023
• Statement-I: By doping silicon semiconductor with pentavalent material, the electrons density increases. Stat… JEE Main 16th Aug 1st Shift 2021
• For extrinsic semiconductors, when doping level is increased JEE Main 25th Feb 2nd Shift 2021
• Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied elect… JEE Main 9th Jan 1st Shift 2019
• What is the conductivity of a semiconductor sample having electron concentration of 5×10¹⁸ m⁻³, hole concentr… JEE Main Online 2017
• If the ratio of the concentration of electrons to that of holes in a semiconductor is 7/5 and the ratio of cu… JEE Main 2006
• In a semiconductor, the number density of intrinsic charge carriers at 27°C is 1.5×10¹⁶ /m³. If the semicondu… JEE Main 25th July 2nd Shift 2021