JEE Main 2026 — Magnetic Effects of Current Question with Solution
JEE Main 2026 (06 April Shift 1)
Question
A small cube of side mm is placed at the centre of a circular loop of radius cm carrying a current of A. The magnetic energy stored inside the cube is J. The value of is _______. ( Tm/A, )
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
The magnetic field at the centre of the circular loop is given by
Substituting the given values, T
The magnetic energy density is
J/m
The volume of the small cube is m
The magnetic energy stored inside the cube is
J
Using , we get J
Comparing with J, we get
Answer:
Substituting the given values, T
The magnetic energy density is
J/m
The volume of the small cube is m
The magnetic energy stored inside the cube is
J
Using , we get J
Comparing with J, we get
Answer:
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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.