Magnetic force


  • Two oils as Helmholtz configuration.

  • Wooden holder for the two coils.

  • Magnetized disc mounted to rotate in gimbals.

  • Power supply.

  • Newton spring.

  • Glass cover on the disc and spring.

  • Connecting cables.


In this experiment, we can demonstrate that no net magnetic force acts on a magnetic dipole in a region of uniform magnetic field.

To show that a net magnetic force on a dipole exists only in the presence of a magnetic field gradient, a spatially varying field.

To determine the magnitude of the magnetic moment of the dipole by measuring the magnetic force in the field gradient dB/dz. and  The basic physics relationship is:


To examine the axial magnetic field gradient of a single current carrying the loop.