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Formula Magnetic field of a current-carrying ring Electric current    Radius   

Formula
Formula: Magnetic field of a current-carrying ring

Magnetic field

Unit
Magnetic field (B-field) generated by an annular, current-carrying conductor loop (ring) along the \(z\) axis. The ring is perpendicular to the \(z\) axis, with the \(z\) axis passing through the center of the ring.

Electric current

Unit
Current flowing through the ring. A larger current produces a larger magnetic field.

Radius

Unit
Radius of the current-carrying ring.

Magnetic field constant

Unit
Magnetic field constant is a physical constant and occurs whenever electromagnetic fields are involved. It has the value: $$ \mu_0 ~=~ 4\pi \cdot 10^{-7} \, \frac{ \mathrm{N} }{ \mathrm{A}^2 } $$