Physics Instruments

Consisting of a graduated meter rule figured 50-0-50 fitted into a grooved stand with two hangers of 50gm each.

A precise knowledge of various magnetic parameters of a ferro - magnetic substance - coercivity, retentivity, stauration magnetization and hysteresis loss and the ability to determine them accurately are important aspects of magnetic studies. To information about the above mentioned properties can be obtained from a magnetization hysteresis loop which can be traced by a number of methods in addition to the slow and laborious ballistics galvanometer method. Among the typical representatives of A.C. hysteresis loop tracers, some require the ring form of samples. But ring form samples are not always practically convenient to make while in others demagnetization effects sometime becomes quite important. The present set up can accept the samples of thin wires of different diameters. The demagnetization effects, different diameters of samples and Eddy current (due to the conducting property of the material) have been taken into account within the design or grahically. Appications The following magnetic parameters can be measured by this setup : . Coercivity . Retentivity . Seturation . Magnetization . Various magnetic phase identification . Hysteresis loss. Measures magnetic parameters accurately Demagneticization, eddy currents and sample cross sectional areas have been caccurate. Capable of detecting the nuimber of mahgnetic phase present in a sample. Faciluiity of accepting different shaped sample wire, thin films, rock samples, powders etc. The equipment is complete in all respects, including a set of a samples (wires of nickel and different grades of iron etc except a CRO).

Supplied as a kit for eight pupils and consists of four plywood beams 600x44x3mm graduated every 38mm and with a groove across its center to locate the fulcrum point. Also included are four fulcrums 32x32x64mm and 40 meter blanks 25mm square. The masses of the blanks are matched to plus or minus 1%

L-section launcher with holes for locating two 19mm dia steel balls which act as projectiles. Launcher is released by push button and projects one ball forward while allowing the other to fall freely. Launching mechanism mounted on wooden block, 180x60x30mm which may be clamped by bench and has a convenient storage pocket for the balls. Complete with two steel balls.

Battery box plastic make. Supplied without cells.
1) Battery box for two cells.
2) Battery box for four cells.
3) Battery box for six cells.

It consists of a circular frame made from non-magnetic silver aluminum alloy. An insulating copper wire is wound on the frame. The ends of the wires are connected to the terminals which are fitted on the superior quality wooden board. A rectangular frame (made from anodized aluminum rods) is supported on wooden board. The anodized aluminum rods are graduated up to 50 cm on both sides. Superior quality permanent magnet compass box moves on a platform (made from aluminum - silver alloy). This platform moves on the rectangular frame along the axis of the coil. Supplied with a superior quality compass box of cat. No. 1078 D

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Gold leaf provides high sensitivity to this electroscope. The glass used has exceptionally good dielectric properties. Conducting strips on sides serve to discharge the leaf when charge becomes excessive, thus reducing likelihood of injury to it. Supplied with aluminum collar and screwed in aluminium top. Elegantly finished on a polished wooden circular base.

Bright teak wood case with glass front and back, with ebonite rod and aluminum fittings.

Approx. size 30 x 1.25 cm.

For transferring small charges from one body to another. A nickel plated brass disk is mounted on an insulated ebonite handle.

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Two pith balls are suspended by a silk thread from an insulating stand approx. 15 cm high.

25 x 25 cm in size, used for producing static charge.

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An insulating stand on tripod base, hammers tone finish, three different shapes of medium size conductors are provided in the set :
a) Conical shaped conductors: shows that the distribution of static charge on a conductor depends upon the curvature of the surface.
b) Hollow sphere shaped conductor: show that charge resides on the outside of the conductor.
c) Cylindrical shaped conductor: shows that electrostatic charge is only on the outer surface of the conductor.

For showing that electrostatic charge resides on the outer surface of a conductor. By removing the outer surface the body is left uncharged. It consists of a brass sphere N.P and two removable hemispheres with insulated handles, mounted on an insulated stand on tripod base, hammer tone finish.

For showing that electrostatic charges is always on the outer surface. The conical shaped silk net is attached to a ring mounted on an insulating stand and may be turned inside out by means of attached strings.