Physics Instruments

These metal blocks are intended for use as sinkers or for specific gravity measurements. Set of six different metals. The set consists one piece each of brass, aluminum, copper, zinc, iron and lead.
Three different size available are :

Cat. No.	Description
a)	10 mm
b)	20 mm
c)	25 mm

These cylinders are often used in exercise with Vernier and micrometer calipers as well as for density and specific gravity measurement. The ends are carefully turned and surfaces are smooth. Set of six different elements in cylindrical form for density in electrical and thermal experiments. The set consists of one piece each of brass aluminum copper, zinc, iron and lead solid cylinders.
Three different size available are :

Cat. No.	Description
1)	25 x 12 mm.
2)	37 x 12 mm.
3)	50 x 12 mm.

The magnetic moments of a bar magnet can be compared quantitatively and the relative field intensities at various distance from a bar magnet can be measured. A highly sensitive compass box (with a permanent magnet) is mounted at the center of a non-magnetic wooden base about one meter long, am metric scale extending outward from each side of the compass box for observing the position of the magnet tested. The compass direction is indicated in degrees. It consists of 18 mm thick laminated board (both side sun mica) with dimensions 40” x 5” with suitable hole at the center for holding compass box. Supplied with permanent magnetic compass box but without magnet.

Hilger & Watt type size 38 x 50 mm approx. 15000 lines per inch for use in the standard holder in the spectrometer table.

Precision type. Designed for accurate and consistent readings. The importane features of the instrument is the provision of fixed collars on the bearings screws which make the needle removal and replacement easy.

1	12” x 18” x 5/18 superior quality soft wood.
2	23” x 16” x5/8 superior quality soft woods.

A useful instrument for calibrating a ballistic galvanometer. The primary coil has 1000 turns and is about 100 cm long fitted on a wooden board. The secondary is in section with separate terminals for each section. Every section of the secondary has its own number of turns marked on the wooden board. Secondary coil has three taping of 100, 250 and 500 turns.

This is an improved form comprising a coil of different number of turns (500, 1000, 2000 or 5000 turns) of 36 SWG copper wire wound on an aluminum metal ring (150 mm dia). A stop limiting rotation to 1800 of the ring is provided with the help of the spring. The cradle supporting the coil of cast non-magnetic alloy 200 x 210 x 115 mm high may be placed either horizontal or vertical. Terminals for connections are mounted on the cradle supporting blocks.

Cat. No.	No. Of Turns
1)	500 turns
2)	1000 turns
3)	2000 turns
4)	5000 turns

A coil is wound on each arm of a U shape bar of soft iron. The poles are 10 mm in diameter and ends are ground flat to make good magnetic contact with iron armature. It will operate on one more dry cells.

Cat. No.	Size
1)	3”
2)	4”

This mass wise and powerful fork which has a frequency of approximately 60 vibrations per sec. is ideal for producing standing waves and is mounted on a heavy cast iron base. An electromagnet is arranged between the prongs of the fork without touching it. Asmall spring type strip is attached to the one of the prongs. A screw just makes a contacts with this strip. Supploed with scale pan, bench clamp with pulley but without weight and thread .

A thin steel rod (called vibrator) is clamped at one end and passes through a small solenoid. The rod is slightly flattened at the free end and a hole is drilled in it so that a string can be tied through it. The solenoid is connected to A.C. mains through a suitable lamp resistance. A permanent horse shoe magnet is mounted on the base board and a steel rod passes between them. The thin rod is magnetized longitudinally. The solenoid and a horse shoe shaped magnet cause it to vibrate with the frequency of A.C. supply. The length of the vibrator is adjusted until its natural frequency corresponds with that of the supply. The whole unit is mounted in a teakwood box. Complete with pulley, pan and cord.

Simple weights for 1070

Same as Cat. No. 1071 but provided with superior quality Indian make revolution counter.

Same as Cat. No. 1071, but provided with disposable revolution counter