JEE Main 2026 — Magnetic Effects of Current Question with Solution
JEE Main 2026 (08 April Shift 2)
Question
A current carrying circular loop of radius cm with unit normal is placed in a magnetic field, . If T and current A, the torque experienced by the loop is ________ Wb·A. ()
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
The magnetic dipole moment of the current carrying loop is given by .
Given radius cm m, the area of the loop is:
m
Substituting the given values A and :
Am
The torque experienced by the loop in the magnetic field is .
Given T, we have:
Evaluating the cross product:
Therefore, the torque is:
Substituting :
WbA
Given radius cm m, the area of the loop is:
m
Substituting the given values A and :
Am
The torque experienced by the loop in the magnetic field is .
Given T, we have:
Evaluating the cross product:
Therefore, the torque is:
Substituting :
WbA
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This is a previous-year question from JEE Main 2026, covering the Magnetic Effects of Current 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.