Physics > Electrostatics

This is a hand driven generator mounted on wooden base. Consist of two Aluminium spheres of dia 150 mm and 75 mm for charge collecting and discharging purpose, respectively. Both the spheres are removable. The discharge sphere is supported on pivoted arm. The large sphere surrounds the upper part of the charge generating belt assembly and charge accumulates on the sphere, when the hand wheel pulley is rotated. The charge generating belt is mounted on a insulated vertical pillar provided with metal brushes. A 4 mm socket is provided at the top of large sphere.

This is meant for automatic generation of electrostatic charges equivalent to 200 Kv for a spark length of 75 mm (Approx). The unit operates on 230 V, 50 Hz mains supply. The charge is transferred from generator to the metallic sphere of dia 150 mm, surrounding the belt mounted on upper pulley. Earth sockets of 4 mm dia has been provided. A separate discharging sphere mounted on a insulated stem is also provided for discharging purpose. The discharging sphere may also be mounted on laboratory stand with base.

The two plates are supported in two rigid uprights and driven by belt in opposite direction. They are heavy, high resistance plastic with sectors of aluminium sheet. Two Leyden jars (condensers) made from glass and aluminium foil. The whole is mounted on a wooden base nicely polished.

a) Black/Transparent plate dia. 200mm
b) Black/Transparent plate dia. 250mm
c) Black/Transparent plate dia. 300mm

Three Conductors, comprising sphere 50mm diameter, cylinder 125 x 50 mm and cone 100 x 50 mm (length x maximum diameter), interchangeable on an insulating stem over metal base.

To show that the charge transferred to a conductor resides on the external surface of the conductor. Consist of pair of Brass hemisphere 50 mm diameter, fitted with insulating handles, hollow sphere with a hole in the centre mounted on a insulated stand.

Consist of two small spheres each mounted on a arc & fitted over an insulating handle made of bakelite rod.

This is to demonstrate the variation of capacity of a condenser on the distance between the plates and the medium in between. Two 100mm dia metal discs mounted on post and their distance can be varied manually. Fitted with insulating handles on a wooden base. Supplied complete with a glass rectangular plate mounted in clips between two discs and may easily be replaced by a plate of some other material, to show the effect of different dielectrics.

For demonstrating the effect of electric discharge from points. Consist of a wheel having a nos. of spokes rotatable freely on an insulating stand.

This is to demonstrate the presence of electric charge over a charged body and its transfer by contact over the electroscope disc, The gold leaf is attached over a metal plate which is attached to an axle and a removeable metal disc on top. The deflection of leaf may be seen by glass windows, one of which is sliding, fitted on a casted body 95 x 60 x 105mm approx, provided with teethed sheet metal, arc inside, a 4mm socket on one side.

A rectangular sheet metal case and a polythene removeable lid. Case fitted with a 4mm earthing socket, sliding glass window, a gold leaf support plate and an arc type notched scale. Supplied with one pair of gold leaves.