Physics

Enables students to investigate nature and properties of electricity by using simple circuits which are easily constructed on a baseboard. The connector system uses P.C.B. strips with cut-out sections whose ends can easily be inserted in spring terminals, ensuring low contact resistance and ease of connection. The kit consists of :

• 1 Baseboard, plastic, with spring terminals and three battery holders.
• 3 Batteries.
• 10 Lamps 1.25 V M.E.S.
• 6 Lamp holders mounted on P.C.B. connectors.
• 10 Plain connector P.C.Bs.
• 1 Wire wound potentiometer with crocodile clip connections.
• 1 Silicon diode.
• 1 Resistor 3.9 ohm 2.5 W.
• 1 pair Leads, red, with crocodile clip at each end.
• 1 pair Leads, black, with crocodile clip at each end.
• 1 pair Leads, yellow, with crocodile clips at each end.
• 2 Switches mounted on P.C.B. connectors.
• 1 PVC rod 15 cm long.
• 2 Soft iron nails, 5 cm long.
• 2m Bare copper wire, swg 20.
• 2m Bare eureka wire, swg 34.
• 2m Plastic covered copper wire.
• 1 Electrode support.
• 10 Pencil lead electrodes.
• 1 Sheet copper foil, 150 mm square.
• 1 Pack Steel wool.
• 1 Instruction manual in English.

This heavy duty demountable transformer can be used for the study of transformer theory and many other alternating current phenomena. This kit consists of:

• A magnetic circuit made of highly permeable U shape metal sheet, which can be closed using two clamps with tightening screws.
• Section: 40 x 40 mm with 150 mm length and 170 mm height.
• One coil of 6000 turns with maximum current of 0.2 ampere. Intermediary coil of 2000 turns output.
• One coil of 600 turns with maximum current of 2.5 ampere, which is mainly used to create the primary of transformer.
• One coil of 1200 turns, with maximum current of 1.25 ampere, fitted with intermediary 400 and 800 turns’ outputs.
• One coil of 72 turns, with maximum current of 12 ampere, fitted with intermediary 6, 30, 54 and 66 turns’ outputs.
• Power supply cable.

Apparatus is designed primarily for demonstration of the basic principles of transformers. It consists of a laminated U-core with laminated I-core, both with 30 x 25 mm cross-section to form a closed core of size 105 x 140 mm. Heavy aluminium alloy stand with removable clamping rods, 2 pole pieces, each 65 x 25 x25 mm with one end cone-shaped, to accept support rod and shading ring. Poles also have a hole drilled through lengthwise to take a light beam.

Comprising 1 welding coil of 5 turns on former with insulated handle and short-circuiting pins, 1 annular melting trough with insulated handle to show heating by induction, 1 jumping ring which is thrown clear when primary current is started and a floating ring which remains freely suspended when primary current is flowing.

Operates on 4 to 6 V battery, on wooden base with two 4 mm socket terminals, provided with self-induced magnetic field.