It comprises mild steel U-shaped bar of circular cross section fitted with bobbins, wound with copper wire and the ends are ground very flat to make good magnetic contact with the iron armature. The connections of the bobbins are made to ensure that direction of winding around each pole is obvious. Supplied with carrying hook, operates on 4-6 volts d.c. Supplied with keeper with hook.
For demonstrating the procedures, but also useful for remagnetising old magnets, compass needles and for general use as a powerful electromagnet. It comprises a solenoid wound with insulated copper wire and mounted on a base complete with switch and 4 mm terminals. Solenoid 250 x 35 mm length x diameter. Operating voltage 12 V a.c. or d.c. at 6 A. Magnetising possible by a.c. or d.c. However, De-magnetising can be accomplished by a.c. only.
To show the action of electric current on a magnet. Cobalt steel needle 75 mm. long with agate bearing supported by pivot mounted on plastic base approx. 65 mm. diameter and surrounded by a rectangle of copper rod 85x 45 mm. fitted with terminals.
It is used to detect the presence and direction of electric current by the deflection of a magnetic needle. It consists of an insulated former wound with 30 turns of copper wire and provided with two terminals and circular scale marked 0-180°-0 divided and figured at every 45°, with magnet pivot and 75mm magnetic needle with brass bearing, operates on 4-6 volts.
Consisting of primary coil of insulated copper wire wound upon cylinder with terminals, secondary coil wound upon cylinder into which primary fits. A soft iron core fits the cylinder of the primary. Complete with terminals.
For demonstrating the conversion of electric energy into mechanical energy. Star shaped copper disc 9cm dia. Rotatable vertically on pair of adjustable centres and dipping.
The apparatus enables electric field patterns to be shown in much the same way that magnetic fields are demonstrated with iron fillings, either by direct viewing or on an overhead projector. The apparatus comprises a clear plastic dish 90 x 12mm dia x depth and base 140 x 125mm, which carries a pair of 4mm socket terminals/electrode holders. Alongside each terminals is a thumbscrew system, which permits fine height adjustment of the electrodes. Six electrodes are supplied, two point source 'two line source' and two circular and two circular rings of 35 and 70mm dia. respectively.
