JEE Main 2026 — Electromagnetic Induction Question with Solution
JEE Main 2026 (22 January Shift 1)
Question
is a vertical smooth long loop having a total resistance where is parallel to and separation between them is . A constant magnetic field perpendicular to the plane of the loop exists in the entire space. A rod of length and mass is made to slide down from rest under the gravity as shown in figure. The terminal speed acquired by the rod is acceleration due to gravity)
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
As rod CD slides down with velocity , it cuts magnetic field lines.
Induced EMF:
Induced current in the circuit:
Magnetic force on the rod (upward, by Lenz's law):
At terminal velocity, acceleration is zero.
Applying Newton's second law:
Induced EMF:
Induced current in the circuit:
Magnetic force on the rod (upward, by Lenz's law):
At terminal velocity, acceleration is zero.
Applying Newton's second law:
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This is a previous-year question from JEE Main 2026, covering the Electromagnetic Induction chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.