Products

Insulator tube, wound with oxidized Eureka wire and mounted on bakelite frame, is provided with laminated brush contacts of phosphor bronze strip, nickel plated rod and 4mm socket terminals. Can be used as series resistance or potential spanider.

Rheostat of any other range can be manufactured as per requirement.

For laboratory use as a variable series resistance or as a potentiometer. Can control current and voltage.

Made from heat resistant, air cooled, hollow porcelain tube closely wound with a resistance wire of copper nickel alloy which is previously oxidised to provide perfect insulation. The end supports are made of metal with provision for screw mounting. A bakelite slider carries a phosphor bronze contact which can be moved rapidly and smoothly and can rest anywhere along the winding. The insulation is sand-papered off where the slider makes contact. Resistance in ohms and current carrying capacities are engraved on contact carriage. Three terminals are provided for electrical connections, one at each end of the winding and the third at one end of the slide rod so that the unit can be used either as a rheostat or as a potentiometer.

Available with a variety of resistances and current carrying capacities. Power ratings (watts) can be calculated as Watts = (Current in amperes)2 x Resistance in ohms

For studying magnetic induction properties produced by electric current and the effect of an iron core, etc.

Consists of a plastic spool with windings of enamelled copper wire having brass binding posts on square end supports. Includes a soft iron core rod of diameter 18cm and instructions.

For studying the functions of the basic parts of electric motors and demonstrating how electrical energy is converted into mechanical energy.

Comprised of a 2-pole D.C. armature with coils and mounted in an aluminium bracket with two binding posts and 4mm socket binding post terminals. The armature is held on brass cone bearings and a shaft fitted with split commutator. Complete with two permanent magnets in adjustable holders mounted on bakelite base (l x w), about 173 x 97mm. Works on 6V D.C. power source.

For investigating strength and direction of a magnetic field due to a current-carrying wire as a long straight conductor or as a coil of one or more turns.

Comprised of a non-magnetic stand about 30cm high with pegs for fixing the surrounding coils, a punched platform and a 50cm diameter compass. Supplied with 3m long flexible copper wire and alligator clips.

For measuring the quantity of electricity from the mass of copper deposited on one of its electrodes.

Consists of three copper plates suspended from a bakelite cover of a plastic jar. Outer two electrodes acting as double anode are connected to one binding post on the top. The third inner copper plate fixed to another binding post acts as a cathode and can easily be removed for weighing.

Model of lifting magnet used in industry, such as scrap metal lifter.

Consist of two plastic bobbins wound with enamelled copper wire and mounted on each arm of a soft iron U-core. Each of the bobbins is fitted with two 4mm socket binding posts. Includes an armature with hook to be used as a lifting ring. Operates on 3-6 Volts D.C. Overall length 100mm.

For generating static electric charges and causing electric discharges. Relative to Van de Graaf it produces higher current with lower voltage.

Consists of two high resistance plastic disks of diameter 25cm approx, with equally spaced metal sectors. The discs are supported in two rigid upright supports, rotating in opposite directions with a hand crank. Provided with a system of induced charge collecting brushes, adjustable ball-ended electrodes and cylindrical Leyden jar capacitors for obtaining higher potential. Produces substantial opposite charges which are deposited in the capacitors and on metal spheres. A rapid sequence of sparks can be generated by lowering the systems capacitance. Mounted on insulated wooden base.

Comprises of a pair of 4mm banana plugs joined together by a supple PVC moulded copper wire.