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Physics Equipment
Van de Graaff Generator
Specifications : Size: 30 x 20 x 77 cm – Weight: approx. 4.4 kg. The Van de Graaff Generator is considered an important and powerful apparatus to perform electricity experiments. Its great appeal and dramaticity attracts
students into the amazing world of physics. Historically developed to accelerate particles in high energy physics experiments, our Van de Graaff Generator has been redesigned to perform demonstrations and experiments in schools. LAWS & PRINCIPLES INVESTIGATED : • Potential difference • Electrostatic repulsion and attraction • Dielectric strength • Point effect.
VAN DE GRAAFF GENERATOR, HAND DRIVEN
Hand operated. mounted on base. For the generation of electric charge. useful in electrostatics and for studying various phenomena associated with electric charge. Comprises a near spherical dome supported on top of an insulated, clear Perspex pillar on the base. A removable flat rubber belt rotates through rollers mounted at both the ends of Perspex pillar. Lower roller shaft has a pulley driven by a hand operated crank through rubber belt. The continuous rotation of the flat rubber belt results in the accumulation of charge on the dome, until electrical breakdown of air surrounding the sphere occurs. With sufficient charge build up on the dome, bringing the earthed discharge sphere sufficiently close to it results in the transfer of charge from dome to ground in the form of electric spark. Earthing terminal provided on the base. Supplied with discharge sphere, mounted on a long insulated handle
VAN DE GRAAFF GENERATOR, MOTOR DRIVEN, LARGE
Similar to Van De Graff Generator in fucntining and design. Comprises a twopiece bigger, near spherical dome of diameter about 275mm, fixed on top of a bigger Perspex pipe, with complete assembly mounted on a sturdy sheet metal casing. Additionally, the base also incorporates an electronic variable speed control for driving the heavy duty motor of the generator. The bigger sized dome increases the charge capacity of the apparatus resulting in higher build up of electric potential. this process accelerated by bigger heavy duty motor and other design changes incorporated in the instrument. Provides for necessary adjustment in all the critical components. Comes with a discharger mounted on a long insulated handle, one side of the discharger being hemispherical. while other pointed to allow an effective demonstration of lighting conductor.
VAN DE GRAAFF GENERATOR, MOTOR DRIVEN, SMALL
Useful for electrostatics experiments, where continuous source of high voltage is needed. A motor driven assembly encased in a sturdy metal box made of specially designed two part aluminium extrusion with insulated plastic side supports for safety. The motor driven lower roller rotates the upper roller assembly located on top of the insulated Perspex pipe through a removable flat rubber belt. The continuous rotation of rubber belt results in accumulation of charge on the one piece near spherical metallic dome, charge being transferred continuously from rubber belt through charge collecting combs. Specially designed dome, with smooth and polished surface free of any surface imperfections, and without any sharp corner or edge to minimize charge leakage. The motor operates on AC mains 220-240V, 50/60Hz, fused input through a 3-Core mains cable. Provided with indicator type ON/OFF switch. On bringing earthed discharge sphere, sufficiently close to the charged dome, transfer of charge from dome to the ground takes place in the form of electric spark jumping from dome to the discharge sphere. Under favourable conditions. it can develop electric potential upto 200kV. with a spark of upto 70mm length. 4mm socket terminal provided at the bottom for earthing and another 4mm insert on top of the dome for charge transfer or attaching accessories. Provides for necessary adjustment in all the critical components. Supplied complete with discharge sphere, mounted on a long insulated handle.
VARIABLE ELECTRIC CAPACITOR
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.
Variable Inductance
Specifications : Weight: approx. 8 kg. A unique apparatus to discover inductance. Learning of magnetism and especially the topic of electric generation of magnetic fields, necessarily passes through the experimental study of tensioned coils whose inductance can be measured and related to theory when Variable Inductance is used. Two iron cores are also supplied; solid iron core when DC supplied and laminated core when AC supplied. COMPONENTS : • Variable Inductance • Solid Iron Core • Laminated Iron Core. LAWS & PRINCIPLES INVESTIGATED : • Generation of magnetic fields by flowing currents • Study of a variable inductance • Role of iron cores • Study of RL, RLC circuits.
VENTILATION APPARATUS
Demonstrates the convection currents in air. Comprises a sheet metal box with open sliding glass front and two circular openings at the top for mounting glass chimneys. On the inner side, below each chimney, a candle holder is mounted. Air heated by a candle placed beneath one of the chimneys with glass door closed, causes the flow of convection currents, which can be observed by bringing a smoldering string near the top of other unheated chimney. Supplied without candles
VENTURI TUBE DEMONSTRATOR
Similar devices fine extensive application in everything from carburetors of IC engines to aircraft airspeed indicators. Comprising of a horizontal glass tube having three cross sections along its length ? wide, narrow and wide respectively, with wide cross-sections having same size. One short, side tuba projects from each of the three cross-sections for connecting to the manometric tubes. Also included is a three-legged manometric tube joined to a common horizontal tube. When gas is flowing through the venturi tube with manometer filled with colored water, the relative pressure at the three points of the tube is evident from the water level in manometers
VIBRATION GENERATOR
Provides Mechanical Oscillations when given input signals from oscillator or AF oscillator. A specially designed coil system enables the unit to be operated at its maximum rating for a prolonged period without any damage due to overheating. The frequency response encompasses the whole of the audio spectrum and beyond. Electrical input via a pair of 4mm shielded sockets and oscillating mechanical output is available through a shaft at the top. A locking arrangement provides safety to the apparatus during storage or transportation by blocking the motion of shaft.
VOLTMETER MULTIRANGE AC DC
Similar to Ammeter in construction but voltmeter with ranges 5V / 25V / 50V /100V / 250V / 500V in both AC and DC.
VOLTMETER, MILLI-VOLTMETERS, DC
Moving coil meters in case, for DC measurements.
VOLTMETERS, DC, DUAL RANGE
Moving coil, in case, ranges selectable through a set of three 4mm socket terminals.
VOLTMETERS, MOVING IRON
Moving iron, AC / DC.
VOLTMETERS, TRIPLE RANGE
Moving coil, in case, ranges selectable through a set of four 4mm socket terminals.
Waltenhofen’s Pendulum
Specifications : Dimensions: approx. 30 x 15 x 10 cm. This piece of equipment was designed by Adalbert Carl von Waltenhofen for the study of Foucault’s
currents. LAWS & PRINCIPLES INVESTIGATED : • Foucault’s (or Eddy) currents
• Faraday-Neumann-Lenz’s law.
WANKEL ENGINE
This sectional model shows the internal structure in detail and demonstrates its basic principle operation. Unlike other engines, this engine incorporates rotary piston arrangements, completely eliminating reciprocating parts. The power piston is an arch shaped triangular rotor, which on rotating through a crank handle at the rear generates an epitrechoid. Ignition simulated by means of a miniature bulb. Mounted on base, with key and printed diagram showing working
WANKEL ENGINE Mounted on metal base with printed diagram and key
This sectional model shows the internal structure in detail and demonstrates its basic principle operation. Unlike other engines, this engine incorporates rotary piston arrangements, completely eliminating reciprocating parts. The power piston is an arch shaped triangular rotor, which on rotating through a crank handle at the rear generates an epitrechoid. Ignition simulated by means of a miniature bulb. Mounted on base, with key and printed diagram showing working
WANKEL ENGINE Mounted on plastic base
This sectional model shows the internal structure in detail and demonstrates its basic principle operation. Unlike other engines, this engine incorporates rotary piston arrangements, completely eliminating reciprocating parts. The power piston is an arch shaped triangular rotor, which on rotating through a crank handle at the rear generates an epitrechoid. Ignition simulated by means of a miniature bulb. Mounted on base, with key and printed diagram showing working
WATER CIRCUIT BOARD
To demonstrate the principle of flow of electricity by analogy. Comprises an analogous circuit made of transparent plastic tubing connected to a low voltage electric pump operating on 6-12V DC for circulating water through the circuit, mounted on a large sheet metal board through spring clips. The circuit has two glass tubes of different bores, connected in parallel across the circuit and represents resistances. Across the resistances is connected a detachable manometer to show the pressure drop across the tubes indicating potential difference. Following the resistances, the tube discharges into a funnel for circulation through the circuit. 4mm sockets provided for power input to the pump. Rate of flow of water through the circuit represents current through the circuit and can be controlled by varying the input to the electric pump. Hoffman's Clips provided for disconnecting either of the two resistances or manometer, when needed.
WATER TURBINE WITH DYNAMO MODEL
To show the conversion of mechanical energy into electrical energy by using it as a water turbine to drive a dynamo for producing electricity. The plastic impeller housed in a cast metal casing with a clear Perspex front that allows viewing of its functioning. The inlet tube provided at the top and outlet tube on the side, both tubes riffled for tubing connectors. A dynamo mounted along the impeller shaft glows the LED indicating the conversion of mechanical energy to electrical energy.
WAVE APPARATUS
For demonstrating both longitudinal as well as transverse motion simultaneously. Construction similar to Cat No. 1120060, but of the total rods supported on eccentric discs, about 2/3rd rods straight and 1/3rd rods bent in L-shape, with the L-shaped rods sliding into a vertical guide and depicts longitudinal wave motion.
WAVE APPARATUS, PLASTIC
Completely made of plastic with basic design and functionality similar to
WAVE APPARATUS. The plastic highlighted tips provide easy observation of wave motion. The rotating handle is fitted with a circular scale marked in degrees to indicate the rotation.
Wave Form Helix
Specifications : Diameter: 8 cm – Unstretched length: 13 cm, stretched length: approx 5 m. LAWS & PRINCIPLES INVETIGATED : • Logitudinal waves.
WAVE FORM HELIX LONG
Steel wire close-wound helix of about 18mm diameter and closed length of about 3m extending to approx. 8m. With looped ends. Useful for demonstrating wave motion.
WAVE FORM, HELIX, SLINKY
For demonstrating wave motion. Helical coil of flat section, tempered steel wire.
WAVE MACHINE, POWELL'S
For demonstrating the movement of progressive transverse waves. Comprises a number of circular discs mounted equidistant from each others on a horizontal shaft in gradually varying degrees of eccentricity, with each disc having a vertical rod of same length supported on top and sliding up and down into a pair of guides. Complete assembly mounted on a wooden base.
WEATHER STATION
A complete maintenance-free weather station intended for outdoor use, with all instruments' mounted inside a specially designed lightweight plastic shelter in beautiful pastel colours. A special plastic plate carries the necessary instruments that can be taken out or mounted inside as desired. When mounted inside, the instruments are well protected from direct sun-light, wind-storms, rains or other negative weathering effects. The plastic plate instrument panel carries a barometer for pressure and weather conditions, hygrometer for relative humidity and mercury type maximum-minimum thermometer for temperature variations. The shelter also houses a rain gauge on one side with openiflg at the top covered with a lid. The walls of shelter provide unhindered air movement for proper measurement of weather parameters. Comes with a wind vane mounted at
its top for wind-direction indication.
WEIGHT PAN
For use with apparatus where loading of weights is required such as inclined plane etc. Comprises a pan with a raised collar to prevent the falling of loaded weights. With three strings tied around the perimeter for suspension.
WESTMINSTER ELECTROMAGNETIC KIT
A comprehensive kit designed to contain all the necessary components for exploring concepts of electromagnetism, such as various types of magnets and their different arrangements and properties, working of motors, dynamos, vibrators and meters, principle of transformers, eddy current and damping etc. standard pack sufficient for 8 students. The complete kit includes ? Anisotropic Alloy Magnets ? Anisotropic Ceramic Ferrite Magnets ? Steel Magnet Yokes Plotting Compasses ? Hardboard Formers for Compasses ? Iron Filing ? Iron Filing Dispensers ? Pair of C-Cores ? C-Cores Clips ? Aluminium Rings ? Aluminium Rings, Split ? Support Bases. ? Armature with Axle Tubes ? Split Pins ? Rivets ? Axle Shafts ? Latex Rubber Tubing ? Wooden Former for Coils ? CelioTape Roles ? PVC Insulated Wire, 26SWG ? White Paste Board Sheets H5? Plain Postcard Sheets ? White Cotton Thread ? Carbon Resistances, 1000 and 1 DO, O. 5W each ? MES Bulbs ? Neon Bulbs ? MES Lamp Holder ? Wooden Clamp and Wooden Block -1 each.
Westminster'sElectromagnetic kit tray 1 of 2
Westminster'sElectromagnetic kit tray 2 of 2
WHEATSTONE BRIDGE, FOUR GAPS
For determination of unknown resistances or comparison of resistances. This substantial FOUR-GAP bridge has broad, heavily plated brass strips mounted on a base. Terminals with 4mm sockets are provided to reduce unwanted resistance to a minimum and the gaps are closed by removable plated brass strips, which are held in position by the terminals. The 24SWG bare constantan wire is stretched along the top of a meter scale graduated in millimeters and figured every centimeter. The ends of the wire are securely clamped to the terminating strips to reduce end errors to the negligible level. Wire easily replaceable if damaged or broken. Supplied WITH JOCKEY.
WHEATSTONE BRIDGE, SLIDE WIRE FORM
For determination of unknown resistances or comparison of resistances. This bridge has broad, heavily plated metal strips mounted on a sturdy anodized aluminium channel section base. Terminals with 4mm sockets are provided to reduce unwanted resistance to a minimum and the gaps are closed by removable plated brass strips, which are held in position by the terminals. The 24SWG bare constantan wire is stretched along the top of a meter scale graduated in millimeters and figured every centimeter. The ends of the wire are securely clamped to the terminating strips to reduce end errors to the negligible level. Features a double-end slider type knife edge for quick, easy and accurate determination of null point. Wire easily replaceable if damaged or broken.
WHEATSTONE BRIDGE, TWO GAPS
Comprising 24SWG bare constantan wire stretched along a meter scale, subspanided in centimeters and millimeters, clamped to stout plated brass terminating plates designed to ensure that the connections are made exactly at the ends of the scale. A heavy plated brass strip with 4mm socket terminals is fastened along the back of the baseboard and provides a TWO-GAP system for normal Wheatstone bridge work. Supplied WITH JOCKEY
WHEEL AND AXLE MOUNTED ON BASE
WHEEL AND AXLE, MOUNTED ON BASE Consisting of a wooden wheel of diameter about 150mm and the axle having diameters 75 and 38mm respectively, mounted in a wooden base on adjustable cone bearings (for minimizing frictionl through a metal shaft passing through its center. Complete
with hooks for suspending masses and
whipcord. Supplied without masses
WHEEL AND AXLE SIMPLE FORM
Comprises an integrated wooden double wheel of diameters 150 and 50mm, with their centers on same axis and having with flat-bottomed grooves for winding of cord. The wheel is pivoted axially on a spindle diameter about 10mm for mounting the apparatus to a suitable retort stand using a clamp. Includes two hooks for suspending masses and about 8m length of whipcord. Supplied without masses.
WHEEL AND AXLE SIMPLE FORM WALL MOUNTING
Mounted on a wooden baseboard through cast metal brackets. The diameters of wheel and axle are 150 and 50mm, respectively. The base has provision for wall mounting. Supplied complete with' two hooks and 8m of whipcord but without masses.
WHIRLING HYGROMETER
The ventilated type of hygrometer gives greater accuracy for humidity demonstrations and is particularly useful for measuring local differences in humidity. There are two thermometers mounted inside a case, fully enclosed to prevent breakage, one dry and other having a wick dipping into a water reservoir at the end of the frame to keep it wet during long periods of non-use. The thermometers are stem engraved with lens fronts for easy reading, range -5 to 50 x 0.5?C. Includes humidity and temperature conversion chart.
WHIRLING TABLE
For demonstrating the various effects associated with the rotation of accessories mounted on it. Cast metal body, stands overall height about 43cm and can be used in both vertical as well as horizontal position. A cast metal adjustable driving wheel fitted towards the lower end of the stand drives a small pulley near the top through a belt. The driven pulley
carries a spindle with socket for taking various accessories. Suitable
for use with Savart's Toothed wheel and disc and an adapter to accommodate colour discs.
WIMSHURST ELECTROSTATIC GENERATOR
A traditional device capable of generating high electrostatic potentials that can produce spark of length up to 3" under favourable weather conditions. Equipped with two clear acrylic plates, each of diameter about 10" and having aluminium sectors permanently pasted radially along the rim. Both the plates mounted parallel to each other and rotate in opposite direction through a belt-pulley arrangement. Pulley on one wheel has handle for manual rotation. A set of charge collecting combs is mounted towards either end of a horizontal insulating beam, together with the adjustable spark gap arms, the latter equipped with small metallic sphere discharger at one end and long insulating handle adjustment at the other end. The charge can be stored in a pair of high capacity Leyden jar capacitors that can be connected or disconnected as desired. When connected to the Leyden jars through a pair of levers, the spherical dischargers starts accumulating the charge and transfer of charge from one discharger to other takes place in the form electric spark jumping from one sphere to other as a consequence of build-up of sufficiently high potential difference across the two spheres. The spark produced intermittently by the continuously rotating plates. Complete apparatus is mounted on a well insulated base that also carries a pair of earthing terminals for the Leyden jars.
Wimshurst Machine
Specifications : Size: 40 x 24 x 43 cm – Weight: approx. 4.4 kg. One of the classic electrostatic generator experiment. The Wimshurst Machine is an electrical generator with a distinctive appearance. With its two large contra-rotating disks mounted in a vertical plane and a spark gap within two metal spheres, the Wimshurst Machine is a historical electrostatic machine used for generating high voltages. Constructed according to the
classical model, this generator is safe to use and robustly built. Structural elements are in cast metal, with all insulating components constructed
from high dielectric strength plastic. Particular attention has been paid to the collection combs and supports so as to prevent damage to the radial
aluminium strips. LAWS & PRINCIPLES INVESTIGATED : • Electrostatic charge • Electrical sparks.
WIND VANE, BALANCED
A simple device for determining the direction of flow of wind. Comprises a large arrow mounted on a metal rod with bearing and mounted on top of steel pivot that aligns itself along the wind. Complete assembly mounted on a metal pillar that carries four arms terminating in the compass cardinal point symbols marked NEWS.
WIND VANE, ECONOMICAL
Similar to WIND VANE, BALANCED but simpler and economical version mounted on stand.
WIRE FOR YOUNG'S MODULUS APPARATUS
For use with Young's modulus apparatus, for use as comparison or experimental wire. Available in diameters 18 to 28 SWG (any gauge).
WIRE HOLDING METAL CHUCKS
For holding metal wires securely in the grip. Self centering chuck has two slots orthogonal to each other forming four jaws, which hold the wire at their center and tighten through a threaded sleeve.
WIRE HOLDING METAL CHUCKS UNIVERSAL
For holding metal wires securely in the grip. Self centering chuck has two slots orthogonal to each other forming four jaws, which hold the wire at their center and tighten through a threaded sleeve.
WIRE HOLDING METAL CHUCKS Wire Holding Chuck, Simple: For wires upto 1.2mm diameter.
For holding metal wires securely in the grip. Self centering chuck has two slots orthogonal to each other forming four jaws, which hold the wire at their center and tighten through a threaded sleeve.
WOOD & METAL CYLINDER
Comprising a cylinder one half of which is polished wood and the other half the other metal. If paper is wrapped tightly around the cylinder and the rod is held above the flame, the portion in contact with the wood will be quickly scorched while the portion in contact with the metal will remain uncharred, showing the differences in their respective thermal conductivities.
WOOD & METAL CYLINDER Wood & Metal Cylinder (large)
Comprising a cylinder one half of which is polished wood and the other half the other metal. If paper is wrapped tightly around the cylinder and the rod is held above the flame, the portion in contact with the wood will be quickly scorched while the portion in contact with the metal will remain uncharred, showing the differences in their respective thermal conductivities.
WOOD & METAL CYLINDER Wood & Metal Cylinder (small)
Comprising a cylinder one half of which is polished wood and the other half the other metal. If paper is wrapped tightly around the cylinder and the rod is held above the flame, the portion in contact with the wood will be quickly scorched while the portion in contact with the metal will remain uncharred, showing the differences in their respective thermal conductivities.
