To demonstrate the properties of a magnetic field in a coil of wire.
- Coil and compass apparatus
- D.C. Powerpak
Magnetic Field at the Centre of Coil
The magnetic field strength at the centre of a circular current may be demonstrated by applying various D.C. currents to the coil. The direction of the field is always along the axis and the strength may be shown by the period of oscillation of the compass needle.