Demonstration Manual

Electricity and Magnetism

DEM35 - Induction by a Moving Magnet

Objective:

- To show that the current is induced in a coil when magnetic lines of force cut the conductors.

Apparatus:

• Coil: 400-turns, hollow square core (Phywe)
• Coil: 1600-turns, hollow square core (Phywe)
• Galvanometer
• Bar magnet
• Short Banana leads

Method:

Terminals of the coil are connected to a galvanometer. Inserting a magnet will produce a deflection on the meter in one direction. A motionless magnet will bring the pointer to zero. Retraction of the magnet will deflect the meter pointer in the opposite direction.

   Watch an Induction by a Moving Magnet video demonstration on Youtube

- Video Created at Utah State University by Professor Boyd F. Edwards and assistants.