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Friday, 9 October

NEET UG 2018 · Physics · Question 21

NEET 2018 Physics, question 21

Question 21 of the NEET 2018 paper (code AA) is a Physics question from Electromagnetic Induction. Its idea, Self Inductance, was asked 3 times, in 2018, 2023 and 2025, across NEET 2017–2026. The CBSE official answer key gives option 4.

Updated 2026-10-08

Q21 · Physics

The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance

  1. 11.389 H
  2. 2138.88 H
  3. 30.138 H
  4. 413.89 HOfficial answer

Official answer: option 4 · CBSE official answer key

Same idea

Self Inductance, in other papers

NEET asked this idea 3 times, in 2018, 2023 and 2025. The other 2 questions below.

  • 2025 Q11AB is a part of an electrical circuit (see figure). The potential difference “VA−VBV_A - V_B”, at the instant when current i = 2 A and is…Figure-based · Medium
  • 2023 Q19The magnetic energy stored in an inductor of inductance 4 μ\muH carrying a current of 2 A is :Numerical · Easy

Self Inductance: every question and how it was framed

The chapter

Electromagnetic Induction in ten years of NEET

14 questions from 2017–2026, asked in 9 of 10 papers, about 1.3 a paper. Faraday's Law alone had 12.

Chapter analysisStudy this chapterPractise this chapter

Electromagnetic Induction: questions per paper

0241’171’182’190’201’212’221’232’241’253’26