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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumConceptual

JEE Main 26 June 2022, Shift 2, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

Two coils of self inductance L1L_1 and L2L_2 are connected in series combination having mutual inductance of the coils as M. The equivalent self inductance of the combination will be :

The figure, in words

Two coils drawn in series along a horizontal wire with a return wire below; current arrows labelled I: upward at the left end, downward at the junction between the coils, upward at the right end.
  1. (1)1L1+1L2+1M\frac{1}{L_1}+\frac{1}{L_2}+\frac{1}{M}
  2. (2)L1+L2+ML_1 + L_2 + M
  3. (3)L1+L2+2ML_1 + L_2 + 2M
  4. (4)L1+L2−2ML_1 + L_2 - 2MOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Electromagnetic Induction
Topic
Inductance
Idea tested
Inductor Combinations

Same topic in other shifts

All Inductance questions
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  2. 5 Apr 2026, Shift 1 · Q50In the given circuit below inductance values of L1L_1, L2L_2 and L3L_3 are same. The magnetic energy stored in the entire circuit is…MediumNumerical valueHas a figure
  3. 6 Apr 2026, Shift 1 · Q43An inductor of inductance 10 mH having resistance of 100 Ω\Omega is connected to battery of E.M.F. 1.0 V through a switch as shown in the…MediumSingle correctHas a figure
  4. 8 Apr 2026, Shift 2 · Q40A 30 cm long solenoid has 10 turns per cm and area of 5 cm2^2. The current through the solenoid coil varies from 2 A to 4 A in 3.14 s.…MediumSingle correct
  5. 2 Apr 2025, Shift 2 · Q43A solenoid having area AA and length ll is filled with a material having relative permeability 2. The magnetic energy stored in the…MediumSingle correct
  6. 5 Apr 2024, Shift 1 · Q44Two conducting circular loops A and B are placed in the same plane with their centres coinciding as shown in figure. The mutual inductance…MediumDiagram basedHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.