A bar magnet is an example of a magnetic moment which is embedded in the material from which the magnet is formed. This property is known as ferromagnetism, and is only exhibited by a few materials. This field is constant, being a property of the particular magnet. However, since it does depend on position it can be used to induce currents in a coil if the location of the magnet relative to the coil is changed.
Instructions Connect the terminals of one coil to the terminals of the galvanometer.
Push one end of the bar magnet into the centre of the coil. Note that there is a deflection of the needle on the galvanometer, indicating that there is a current flow. Note the magnitude of the deflection and also its direction. Pull the magnet back out, and note the deflection. Try pushing the magnet into the coil at different speeds from very slow to fast.