Keywords: Helmholtz zfield.png Magnetic field induction along Helmholtz coils z axis is perpendicular to the surface of coils and z 0 is the point in the middle between the coils Author Grzegorz Brzezinka Poland graph en wikipedia Helmholtz_coil de wikipedia Helmholtz-Spule pl wikipedia Cewka_Helmholtza Helmholtz coils |