JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 26 June 2022, Shift 1, Physics Q42

Question 42 of 90 in this shift, Physics question 12 of 30, Section A.

The magnetic flux through a coil perpendicular to its plane is varying according to the relation

\phi=(5t^3+4t^2+2t-5)

Weber. If the resistance of the coil is 5 ohm, then the induced current through the coil at t=2 s will be,

(1)15.6 AOfficial answer
(2)16.6 A
(3)17.6 A
(4)18.6 A

Official answer

Option 1

NTA final key.

Chapter: Electromagnetic Induction
Topic: Faraday's Law
Idea tested: Magnetic Flux Calculation

Same idea in other shifts

Asked 3× in all

6 Apr 2023, Shift 1 · Q38The induced emf can be produced in a coil by A. moving the coil with uniform speed inside uniform magnetic field B. moving the coil with…EasyOther
10 Apr 2023, Shift 2 · Q58A square loop of side 2.0 cm is placed inside a long solenoid that has 50 turns per centimetre and carries a sinusoidally varying current…MediumNumerical 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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.