e&m.jpg (12862 bytes)

CURIE POINT PENDULUM AND WHEEL

EQUIPMENT
    redball.gif (326 bytes) Chain with hacksaw blade
    redball.gif (326 bytes) Magnet
    redball.gif (326 bytes) Bunsen Burner
    redball.gif (326 bytes) Curie Wheel
    redball.gif (326 bytes) Lens
    redball.gif (326 bytes) Light


NARRATIVE
        Magnetic domain alignment is dependent on temperature. At the Curie point, thermal agitation overcomes the magnetic force which tends to line up the domains.

        Arrange the magnet and pendulum (which consists of a piece of hacksaw blade suspended by a chain) so that the pendulum is displaced from its equilibrium position. Heat the blade with a Bunsen burner. When it is red hot, the blade will swing away from the magnet.