B = μ₀I/2R at center of coil.
Back to JEE Main 2023 Electromagnetism
JEE Main 2023 — Physics Electromagnetism
medium
mcq
2023
Official previous-year question
Verified 30 May 2026.
Question
The magnetic field at the center of a circular coil of radius R carrying current I is
Options
- Aμ₀I/R
- Bμ₀I/2R
- Cμ₀I/4R
- D2μ₀I/R
Solution
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.
JEE Main Electromagnetism in other years
More JEE Main Electromagnetism Questions
A charged particle moves in a uniform magnetic field. If the velocity is perpendicular to the field, the path of the particle is:
2026
easy
mcq
A long straight wire carries a current of 10 A. The magnetic field at a distance of 0.1 m from the wire is:
2026
easy
mcq
The magnitude of force on a charge q moving with velocity v in a magnetic field B at angle θ is:
2025
medium
mcq
The electrostatic force between two point charges q₁ and q₂ separated by distance r is given by Coulomb's law as:
2024
easy
mcq
A current carrying circular loop of radius R produces a magnetic field B at its center. At what distance from center on its axis, the magnetic field becomes B/8?
2023
hard
mcq