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IMPACT CAR (0705)
Useful for demonstrating the momentum changes of varying mass with a visual measure of force. The simple car is equipped with a spring loaded plunger and sliding scale that gets displaced on impact against an obstacle, the displacement being directly related to the quantum of impact created by collision of the car against any stationary surface. The displacement scale remains in displaced position until it is reset and provides direct reading, which is measure of the force itself. Masses can be added to the car to increase the inertia of the mass and car system for further exploration in collisions.
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CALORIMETER, DOUBLE WALL, ALUMINIUM (0706)
Double vessel calorimeter with inner smaller vessel of about 300ml capacity positioned inside bigger aluminium vessel of about 900ml capacity with air insulation between them to minimize heat loss. The vessels have a insulated plastic lid for thermal insulation at the top and two holes - bigger one for holed rubber stopper to mount thermometer and amaller one for stirrer. Supplied complete with stirrer but without thermometer.
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MAGNETIC FIELD DEMONSTRATOR, 3-DIMENSIONAL (0707)
A versatile and impressive tool for displaying magnetic field patterns due to a magnet on the projection screen using an overhead projector. Comprises a series of large number of iron needles mounted on a transparent acrylic plate, with a number of plates arranged radially in vertical fashion. One of the plates is removable to mount a magnet at the center, making the needles behave like a magnetic compass. The magnetic field pattern is readily visible on all the vertical plates.
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ELECTROSCOPE, GOLD LEAF, ALUMINIUM EXTRUSION (0708)
Comprises a pair of specially designed aluminium extrusion walls mounted parallel to each other and supported on top and bottom by moulded plastic plates. Provided with removable front and back sliding glass panels, one clear and other ground, respectively. The disc electrode is mounted through the upper lid connected to a metal blade at its underside, which in turn has a fine sheet metal leaf pivoted at its center to provide deflection with the charging of the electrode. Case fitted with terminal at the side for earthing. The upper lid also has a circular arc scale attached at its underside for noting the deflection of leaf.
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DIP CIRCLE (0709)
For determination of vertical component of earth's magnetic field at a particular location. Comprises an accurately balanced needle on a non magnetic metal strip attached to the circular scale divided in four quadrants, graduated 90?-0-90?-0-90? for reading the inclination of needle, both of which are mounted on a non-magnetic cradle and can be rotated about horizontal axis. The complete assembly is mounted on a sturdy cast metal base through a nonmagnetic pillar which is rotatable about vertical axis. The vertical rotation can be read directly from a circular scale fitted on base, graduated 0-360?. Fitted with leveling screw and spirit level.
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PARALLEL PLATE (0710)
For the study of principle of capacitors and the relationship between surface area of conducting plates, separation and dielectric medium between the two plates. Comprises of two circular metal plates, about 200mm in diameter mounted on an insulated base. The plates can slide in the narrow lot provided on top of the base to adjust separation between them from 0 to 200mm. The plates are electrically connected to a pair of 4mm shrouded sockets for electrical connections.
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RESISTANCE COILS, IN CYLINDRICAL TRANSPARENT CASE (0711)
Non-inductively wound with double silk covered constantan coils on insulated plastic bobbins positioned in a transparent cylindrical plastic container by means of a plastic lid having 4mm socket terminal at its top. Values clearly marked on each coil. Available in Eureka / Constantan Wire or Magnin Wire.
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RHUMKORFF'S COIL (0712)
High quality, trembler type spark coil. comprising primary of few turns of heavy wire wound on iron core, mounted horizontally, which is fed by DC current pulses. Secondary coil of very large number of turns of very thin gauge wire completely encompasses the primary and is impregnated with wax. The electromagnetic induction due to current passing through the primary makes the armature oscillate resulting in frequent switching ON/OFF of the current through primary. This produces extremely high rate of change of magnetic field in this Rhumkorff's coil, giving rise to a potential of several thousand volts in secondary, which is observable in the form of repetitive spark up to 25mm long across adjustable needle. Provided with a safety spark gap beneath needle socket terminals to protect internal damage to the coil against very high voltages. Output from the terminal can also be used to operate high voltage devices such as spectrum tubes etc. operates on 6-9V DC.
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MOUNTED RESISTANCE COILS (0713)
A useful apparatus for showing how resistance varies with the type of wire, length of wire and. diameter of wire in coils. The apparatus can be used with wheatstone bridge or a suitable ohm-meter. Lengths and diameters of wires are in two to one ratios to simplify computations. A set of five collinear coils wound on identical bobbins and mounted on anodized aluminium sheet with six 4mm sockets to facilitate electrical connections.
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FIXED ELECTRIC CAPACITOR (0714)
Comprises a fixed capacitor of value 3.15?F, rated at 350V AC, mounted on a box. Other values at different ratings also available on specific request.
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VARIABLE ELECTRIC CAPACITOR (0715)
Useful for electrical/electronic circuits needing variable values of capacitances. Comprises a continuous variable capacitor mounted in a box. The value of capacitor is selectable through a rotary knob provided at the top. With a pair of 4mm socket terminals for electrical connection.
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PUSH SWITCH (0716)
Part of electronic component modules. Pushing the switch closes the connection between the two 4mm sockets provided on top. Useful for switching on a circuit for a short while.
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TWO WAY SWITCH (0717)
A two way toggle switch mounted on the plastic case provides connection between left and middle 4mm sockets or middle and right 4mm sockets. Useful for switching circuits
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NEWTON'S COLOUR DISC, MOUNTED ON MOTOR (0718)
For demonstrating that white light is composed of all the spectral colours through the additive mixing of the colours. Comprising a multicoloured circular disc of about 80mm diameter, having sectors of various spectral color in proper proportions, mounted on a low voltage DC motor. On rotating the disc, all the colours are observed to disappear by merging into a single white colour. Provided with colour-coded wires terminating in 4mm banana plugs, connected to the motor for power input.
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OPTICAL BENCH, DELUXE, TRIANGULAR SECTION (0719)
A heavy duty, sturdy optical bench designed for high end use. Practically all optical bench related experiments can be performed using various accessories. Comprises a triangular metal section supported at each end on cast metal legs. Both the legs provided with leveling screws. On one side, the bench has scale graduated in millimeters for noting the position of riders. Also includes specially designed tilt-proof, smooth sliding riders to sit properly on top of the bench and have index mark to facilitate position reading. The riders have vertical pillar at their top with hole to take various accessories, which can be adjusted for their vertical heights. The height of the accessories and riders is so designed so as provide common optical centers of the accessories for proper experiments. Accessories included are ? 6 Riders, ? 2 Optical pins, ? 2 Lens & Mirror holders, ? 2 Object /Image screen.
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