Current balance

Equipment :

  • DC Power supply 30V, 5A.

  • 6 permanent magnets with holder.

  • Digital balance.

  • Wire frame with different wire length 8,6,4,3,2,1 cm.

  • Holder for wire frame.

  • Metallic base.

  • Metallic stand.


In this experiment, we can measure the force acting upon an electric conductor, placed in a magnetic field.

When an electric conductor, with the length L, is within a magnetic field (B), and a current (I) is running through the conductor, this will be acted upon by a force, called the Lorentz Force or Laplace’s law ,  which can be calculated by the following formula  F = B · I · L

This formula presupposes that the magnetic field is perpendicular to the conductor.