Learn

Saturday, 31 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 6 April 2026, Shift 1, Physics Q43

Question 43 of 75 in this shift, Physics question 18 of 25, Section A.

An 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 figure below. After switch is closed, the ratio of instantaneous voltages across the inductor when the current passing through it is 2 mA and 4 mA is ________.

The figure, in words

Series circuit: inductor, battery and a switch in a single loop.
  1. (1)4/3Official answer
  2. (2)3/4
  3. (3)5/3
  4. (4)3/5

Official answer

Option 1

NTA final key.

Chapter
Alternating Current
Topic
Inductance
Idea tested
Equivalent Circuit of a Non-Ideal Inductor

Same topic in other shifts

All Inductance questions
  1. 2 Apr 2026, Shift 2 · Q43A circular current loop of radius R is placed inside square loop of side length L (L >> R) such that they are co-planar and their centers…HardSingle correct
  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. 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
  4. 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
  5. 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
  6. 5 Apr 2024, Shift 2 · Q59The current in an inductor is given by I=(3t+8)I=(3t+8) where t is in second. The magnitude of induced emf produced in the inductor is 12 mV.…EasyNumerical value

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.