PHYSICS | Electricity and Electromagnetism | Electromagnetics A
A. Apparatus to Show Force on a Conductor in a Magnetic Field
Comprising a strong U-shaped magnet and a pair of brass rails with 4mm socket terminals. A brass axle with plastic discs is free to roll along the rails and completes the electrical contact between them. When the axle is placed on the rails between the poles of the magnet, and a power supply unit is connected, the axle is repelled and rolls along the rails away from the centre of the magnetic field. Dimensions: 175 x 60 x 58mm high.
E8H26629 each £71.95 B. Eddy current - Wacamole
Fun and dramatic demonstration of Lenz’s Law. Interactive and entertaining demonstration of induced currents and magnetic fields.
Lenz’s Law can be demonstrated using the standard Eddy Current Tubes whereby a magnet falls through a copper tube at a slower rate than an un-magnetised weight. The demonstration lends itself to a fun classroom activity based on the village fete challenge of Splat the Rat. Two ‘rats’ are supplied, one containing strong neodymium magnets and the other just a metal weight. 1m of copper tube and a foam-covered rounders bat completes the kit. In use, the challenge for the pupil is to hit the rat as it emerges from the tube. It gives a dramatic demonstration of Lenz’s Law since the magnetised rat takes about 5 seconds to exit the tube.
E8R07733 C. Eddy Current Kit NEW 214
For providing a qualitative practical demonstration of Lenz’s law. Comprising a copper tube 320 x 15mm (l x d) together with a pair of cylindrical ‘plugs’. The plugs are identical in appearance and mass but one is plain steel and one is a powerful neodymium magnet. The time taken to fall is greatly extended as a result of the eddy currents induced in the copper generating a magnetic field which opposes the movement of the magnet. Supplied with a pair of plastic caps to provide self contained storage.
E8F64953 Quality, Choice, Innovation each £14.95 each £48.95