JEE Main 2026 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 8 April 2026, Shift 2, Physics Q40

Question 40 of 75 in this shift, Physics question 15 of 25, Section A.

A 30 cm long solenoid has 10 turns per cm and area of 5 cm

^2

. The current through the solenoid coil varies from 2 A to 4 A in 3.14 s. The e.m.f. induced in the coil is

\alpha \times 10^{-5}

V. The value

\alpha

is ________.

(1)60
(2)12Official answer
(3)120
(4)34

Official answer

Option 2

NTA final key.

Chapter: Electromagnetic Induction
Topic: Inductance
Idea tested: Self-Inductance of a Solenoid

Same topic in other shifts

All Inductance questions

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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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.