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Physics - Semiconductors

Practise 6 NEST (NISER) previous year questions on Semiconductors, compiled from papers spanning 2016 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEST (NISER) tests.

Semiconductors has been asked in 6 of the 16 years of NEST (NISER) papers analysed (2011–2026), with 6 questions in all. 17% of them were easy, 67% moderate and 17% tough. Most of its questions came from 2025, with 1 question that year. In the last three years (2024–2026) it had 1 question across 4 papers, about 0.3 per paper.

The chapter's 2 topics are not weighted equally: Diodes (5 questions, 83%) and Energy Bands in Solids (1 question, 17%) have been asked the most. Diodes has also led over the last five years, with 2 questions. Diodes has produced the most tough questions (1).

  1. 1A p-n junction diode in a circuit is in reverse bias but not under breakdown condition. As compared to the p-n junction diode in a forward b2025Diodes
  2. 2An unbiased silicon based p-n junction along with the net charge density profile is shown in the figure. The and sides are doped with phosph2022 (Session 1)Diodes
  3. 3The remote control of a TV emits infra-red light of wavelength 900 nm . The TV detector is made of a semiconductor whose band gap is . The d2020 (Session 2)Energy Bands in Solids
  4. 4Consider the circuit with an ideal p-n diode as shown. Let be the voltage applied at the terminal P . The equivalent resistance between the 2018Diodes
  5. 5A circuit with Si and Ge diodes is shown in the accompanying figure. The barrier potential for Silicon is and that of Germanium is . If the 2017Diodes
  6. 6Four ideal diodes are connected to form a circuit as shown in the figure. An AC signal volt is applied across points 1 and 2 and the output 2016Diodes

Frequently Asked Questions

1.How many questions are available for Semiconductors?

This chapter includes 6 questions compiled from NEST (NISER) papers spanning 2016 to 2025.

2.Are these questions only from NEST (NISER), or from other exams too?

These are NEST (NISER) questions specifically for the Semiconductors chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Semiconductors an important chapter for NEST (NISER) Physics?

Semiconductors has appeared in 6 of the 16 years of NEST (NISER) papers covered here, with 6 questions across 6 papers - about one per paper it appears in.

4.What is the difficulty level of Semiconductors questions in NEST (NISER)?

Of the 6 questions analysed for this chapter, 17% are easy, 67% moderate and 17% tough. 2025 had the most, with 1 question.

5.Which topics in Semiconductors should I focus on?

These topics have carried the most weightage in Semiconductors:

  • Diodes - 5 questions (83%)
  • Energy Bands in Solids - 1 question (17%)
  • Diodes has produced the most tough questions (1).
6.Is Semiconductors's weightage in NEST (NISER) going up or down?

Across all 6 papers analysed, Semiconductors has averaged about 1.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.