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Saturday, 31 October

JEE Main · Physics · Alternating Current

Real Inductor (Choke Coil) Phasors

JEE Main asked Real Inductor (Choke Coil) Phasors 4 times in 4 of the 108 shifts Lumi analysed, in 2020, 2021 and 2024. It belongs to Phasor Diagrams, in Alternating Current (Physics). The longest wait between two years asking it was 3 years. In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170.08’200.03’210’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 of 12
  • 20220 of 24
  • 20211 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Coil inductance from dc and ac currents
  • Power in real inductor from dc and ac data

Difficulty

Easy 0Medium 4Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 9 Apr 2024, Shift 1 · Q58When a coil is connected across a 2020 V dc supply, it draws a current of 55 A. When it is connected across 2020 V, 5050 Hz ac supply, it…MediumNumerical value
  2. 6 Apr 2024, Shift 1 · Q55When a dcdc voltage of 100V is applied to an inductor, a dcdc current of 5A flows through it. When an acac voltage of 200V peak value is…MediumNumerical value
  3. 4 Aug 2021, Shift 2 · Q5A choke coil is needed to operate an arc lamp at 160 V (rms) and 50 Hz. The arc lamp has an effective resistance of 5Ω5\Omega when running…MediumSingle correct
  4. 2 Sep 2020, Shift 2 · Q14An inductance coil has a reactance of 100 Ω\Omega. When an AC signal of frequency 1000 Hz is applied to the coil, the applied voltage…MediumSingle correct

Shifts: 2 Sep 2020, Shift 2, 4 Aug 2021, Shift 2, 6 Apr 2024, Shift 1, 9 Apr 2024, Shift 1.

Same topic

Other ideas in Phasor Diagrams

Phasor Diagrams has 13 ideas JEE Main has asked; 7 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas