What is the direction of the magnetic field at the nter of a circular current-carrying loop?
Using the right-hand rule, if the fingers curl along the direction of the current in the loop, the thumb points perpendicular to the plane of the loop, indicating the field direction at the nter.
Ref: NCERT Physics Textbook for Class XI and XII, Chapter: Moving Charges and Magnetism, Topic: Magnetic field at center of circular loop, right-hand rule and direction perpendicular to plane. The section explains definitions, governing laws, formulas like μ₀ = 4π × 10⁻⁷ T·m/A, units and illustrative examples.