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Saturday, 31 October

JEE Main 2026 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 5 April 2026, Shift 1, Physics Q50

Question 50 of 75 in this shift, Physics question 25 of 25, Section B.

In 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 (UtU_t) and that stored in the L2L_2 inductor is (UlU_l). Ut/UlU_t / U_l is ________. (Ignore the mutual inductance if any)

The figure, in words

L1 in series with a parallel combination of L2 and L3; current flows in from the left through L1, splits through L2 and L3, and exits on the right.

Official answer

6

NTA final key.

Chapter
Electromagnetic Induction
Topic
Inductance
Idea tested
Energy Stored in Inductors

Same idea in other shifts

Asked 7× in all
  1. 11 Apr 2023, Shift 2 · Q57A coil has an inductance of 2H2\mathrm{H} and resistance of 4 Ω4\ \Omega. A 10 V10\ \mathrm{V} is applied across the coil. The energy stored…EasyNumerical value
  2. 25 Jun 2022, Shift 1 · Q59The current in a coil of self inductance 2.0 H is increasing according to I=2 sin(t2t^2) A. The amount of energy spent during the period…MediumNumerical value
  3. 3 Aug 2021, Shift 1 · Q24An inductor coil stores 32 J of magnetic field energy and dissipates energy as heat at the rate of 64 W when a current of 8 A is passed…MediumNumerical value
  4. 26 Aug 2021, Shift 1 · Q9An inductor coil stores 64 J of magnetic field energy and dissipates energy at the rate of 640 W when a current of 8 A is passed through…MediumSingle correct
  5. 25 Feb 2021, Shift 1 · Q23A coil of inductance 2 H having negligible resistance is connected to a source of supply whose voltage is given by V=3t volt. (where t is…MediumNumerical value
  6. 4 Sep 2020, Shift 2 · Q15A series L-R circuit is connected to a battery of emf V. If the circuit is switched on at t=0t=0, then the time at which the energy stored…MediumSingle correct

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.