Helmholtz coil ( the magnetic field at the center point)

Description

A Helmholtz coil is a device for producing a region of nearly uniform magnetic field. It consists of two identical solenoid electromagnets on the same axis. Besides creating magnetic fields, Helmholtz coils are also used in scientific apparatus to cancel external magnetic fields, such as the Earth’s magnetic field. The magnetic flux density at the midpoint between the coils can be calculated by the current flowing through the coils and the radius of the coils.

Related formulas

Variables

B The magnetic flux density at the midpoin (T)
μ0magnetic constant
NNumber of turns (dimensionless)
IThe current flowing through the coils (A)
RThe radius of the coils (m)