As shown in the equation above, the strength of the magnetic field is dependent upon three quantities: In the case of the Helmholtz coils, the field points of interest are located in the mid-plane between the two coils. The strength of magnetic field is measured at a point in space (often called the field point). A charge moving in space is called a 'current' (denoted by the symbol I) and is measured in coulombs/sec or amperes. German scientist and philosopher who made fundamental contributions to physiology, optics, electrodynamics, mathematics, and meterology.Ī pair of conducting circular coils each having N turns, each carrying a current I, separated by a distance equivalent to the radius of the circular loops, produce a homogeneous magnetic field B in the mid-plane between the two circular coils.Ī magnetic field is created whenever charge is in motion-either moving in space or spinning around itself.
