NEET UG 2021 · Physics · Question 21
NEET 2021 Physics, question 21
Question 21 of the NEET 2021 paper (code O1) is a Physics question from Semiconductor Electronics: Materials, Devices and Simple Circuits. Its idea, Intrinsic and Extrinsic Semiconductors, was asked twice, in 2019 and 2021, across NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q21 · Physics
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
- 1current in n-type > current in p-type.Official answer
- 2No current will flow in p-type, current will only flow in n-type.
- 3current in n-type = current in p-type.
- 4current in p-type > current in n-type.
Official answer: option 1 · NTA final answer key
Same idea
Intrinsic and Extrinsic Semiconductors, in other papers
NEET asked this idea twice, in 2019 and 2021. The other question below.
- 2019 Q18For a p-type semiconductor, which of the following statements is true ?One-line MCQ · Easy
Intrinsic and Extrinsic Semiconductors: every question and how it was framed
The chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits in ten years of NEET
27 questions from 2017–2026, asked in 10 of 10 papers, about 2.6 a paper. Semiconductor Devices alone had 17.