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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 9 April 2024, Shift 2, Physics Q45

Question 45 of 90 in this shift, Physics question 15 of 30, Section A.

A square loop of side 1515 cm being moved towards right at a constant speed of 22 cm/s as shown in figure. The front edge enters the 5050 cm wide magnetic field at t=0t=0. The value of induced emf in the loop at t=10t=10 s will be :

The figure, in words

Square loop of side 15 cm at left moving right at 2 cm/s toward a region of uniform magnetic field B = 1.0 T directed into the page (crosses), region 50 cm wide.
  1. (1)zeroOfficial answer
  2. (2)0.30.3 mV
  3. (3)33 mV
  4. (4)4.54.5 mV

Official answer

Option 1

NTA final key.

Chapter
Electromagnetic Induction
Topic
Faraday's Law
Idea tested
EMF Profile of Loop Entering/Exiting B-Field

Same topic in other shifts

All Faraday's Law questions
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  2. 5 Apr 2026, Shift 2 · Q36A metal rod of length LL rotates about one end at origin with a uniform angular velocity ω\omega. The magnetic field radially falls off…HardSingle correct
  3. 5 Apr 2026, Shift 2 · Q50A circular loop of radius 20 cm and resistance 2 Ω\Omega is placed in a time varying magnetic field B⃗=(2t2+2t+3) T\vec{B}=(2t^2+2t+3)\ \mathrm{T}. At…EasyNumerical value
  4. 6 Apr 2026, Shift 2 · Q39A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as B=0.4sin⁡(300t)B=0.4\sin(300t) Tesla. The normal to the plane…MediumSingle correct
  5. 8 Apr 2024, Shift 1 · Q60A square loop PQRS having 10 turns, area 3.6×10−3 m23.6\times10^{-3}\ \mathrm{m^2} and resistance 100 Ω100\ \Omega is slowly and uniformly being…MediumNumerical valueHas a figure
  6. 29 Jan 2024, Shift 1 · Q58A square loop of side 10 cm and resistance 0.7 Ω0.7\,\Omega is placed vertically in east-west plane. A uniform magnetic field of 0.20 T0.20\ T is…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 42 of the 174 JEE Main shifts held from 2017 to 2026.