JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 8 April 2023, Shift 2, Physics Q48

Question 48 of 90 in this shift, Physics question 18 of 30, Section A.

An emf of 0.08 V is induced in a metal rod of length 10 cm held normal to a uniform magnetic field of 0.4 T, when moves with a velocity of:

(1) $20\ \mathrm{ms^{-1}}$
(2) $2\ \mathrm{ms^{-1}}$ Official answer
(3) $0.5\ \mathrm{ms^{-1}}$
(4) $3.2\ \mathrm{ms^{-1}}$

Official answer

Option 2

NTA final key.

Chapter: Electromagnetic Induction
Topic: Faraday's Law
Idea tested: Linear Motional EMF

Same topic in other shifts

All Faraday's Law questions

2 Apr 2026, Shift 1 · Q38When a coil is placed in a time dependent magnetic field the power dissipated in it is $P$ . The number of turns, area of the coil and…MediumSingle correct
5 Apr 2026, Shift 2 · Q36A metal rod of length $L$ rotates about one end at origin with a uniform angular velocity $\omega$ . The magnetic field radially falls off…HardSingle correct
5 Apr 2026, Shift 2 · Q50A circular loop of radius 20 cm and resistance 2 $\Omega$ is placed in a time varying magnetic field $\vec{B}=(2t^2+2t+3)\ \mathrm{T}$ . At…EasyNumerical value
6 Apr 2026, Shift 2 · Q39A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as $B=0.4\sin(300t)$ Tesla. The normal to the plane…MediumSingle correct
8 Apr 2024, Shift 1 · Q60A square loop PQRS having 10 turns, area $3.6\times10^{-3}\ \mathrm{m^2}$ and resistance $100\ \Omega$ is slowly and uniformly being…MediumNumerical valueHas a figure
9 Apr 2024, Shift 2 · Q45A square loop of side $15$ cm being moved towards right at a constant speed of $2$ cm/s as shown in figure. The front edge enters the $50$ …EasySingle correctHas a figure

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.