Physics Laboratory Products

Electricity-cells- porous pots, for use in Physics laboratory.

Electricity-cells-leclanche cell- it consists of 2 pint size complete with charged porous pot with screw terminal zinc rod with wire connector, glass jar/plastic jar, standard quality.

Electricity cells daniel cell complete in copper vessel with terminal and a perforated shelf near the top to carry copper sulphate crystals, with porous pot and zinc rod fitted with terminal.  

Electricity-cells-simple cell- a glass jar 150 x 100 mm height x dia with 150 x 50 mm zinc and copper plates with terminals.  

Electricity-cells-accumulators- multiplate type in plastic container 9 plates with terminals. Without acid uncharged, iron zinc plated handle provided.

Electricity-cells-zinc rods- zinc rod :-  with brass terminals 150x10mm and 150x12. 5mm for daniell cell 

Capacity-capacitor plates- two circular plates with terminals connections are mounted on perspex rods. Adjustable through their supports mounted on a clear perspex base board a pith ball fitted on a cotton thread its also included.  

Capacity- capacitor plates- comprising two aluminium plates 250 mm square x 3 mm thick each with 4 mm socket  fitted to one corner. Complete with a dielectric sheet of polythene 1. 5 mm thick  approx. And a strip of the same material from which spacers may be cut. And a strip of the same material from which spacers may be cut.  

Capacity- discharge electrode - consists of each arm 150 mm long and is mounted to a clear acrylic handle about 125 mm long.  

Electrostatics-generator- van de graff generator - motorised with 220 volt 50 hz motor on base with belt arrangement, removable,  polished aluminium metal sphere of 165mm dia. At the top spherical discharger of  75mm dia mounted on an insulating rod drilled at the end to take a 4mm plug. Gives a  spark length of 70mm approx. The main metal dome has a socket on top in which different accessories can be attached. One spare belt supplied. Complete with 3 core p. V. C covered mains cable for connection to main supply.  

Electrostatics-generator- van DE graff generator - an impressive & convenient source for charging electroscopes & proof planes as well  well as demonstrating the nature of high voltage static charges. Approximate 14" high  with 4" diameter electrode.  supply with accessories.

Electrostatics-generator- van de graff generator -hand operated on wooden board. Two insulated pulleys are hand driven by rubber belt. The generator is self exiting and charge separation occurs. The resulting positive and   negative charges being carried off by combs at lower & upper pulleys. A metal sphere  surrounds the upper pulley assembly and charge accumulates on the sphere, which is insulated by a plastic column supporting the pulley assembly. The charge builds up  until electrical breakdown of air surrounding the sphere occurs.  supplied with discharging sphere.  

Electrostatics-generator- wimshurt machine - 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 made from corning glass and aluminium foil. The whole is mounted on  a wooden base nicely polished.  

Electrostatics-generator- discharge electrode - small polished aluminium sphere mounted on a plastic rod. Used to discharge a van de  graaff generator. Including with flexible wire with a banana plug on one end and a clip  the other end for attached the base of generator.  

Electrostatics-generator- discharger - small plated brass spheres mounted on curved arms jointed improved double arms chrome plated with insulated handles.  

Electrostatics-generator-whirl-demonstrating the effect of electric discharge from points. The apparatus has a 60mm  diameter, three pointed star wheel with all the points curved in one direction. The  wheel rotates freely on a pivot point mounted on a short stand . 

Electrostatics-generator-accessories-these are provided with 4mm pegs to fit into the top socket of the van de graaff generator.

Electrostatics-generator-biot’s apparatus-with one central sphere with hole and 2 hemispherical metal covers with insulated  handles  

Electrostatics-generator-conductors set-cylinder, cone and sphere, all brass on insulated bases. Cylindrical conductor length 150 mm, dia 75 mm. Conical conductor length 150 mm, maximum dia 75 mm & sphere 75 mm dia length 150 mm 

Electrostatics-generator-discharge electrode-small polished aluminium sphere mounted on a plastic rod. Used to discharge a van  de graaff generator. Including with flexible wire with a banana plug on one end and a clip the other end for attached the base of generator. All apparatus fitted on the base.  

Electrostatics-generator-epinus condenser-two brass 100mm discs on insulated pillars with pith ball pendulum a removable   rectangular glass plate on insulated pillar is supported between the three pillars can   be slided and clamped with the help of wing nut on the rod in any position.  

Electrostatics-generator-proof plane-it consists of brass disc 25 mm dia fixed on an insulated handle. It is used to transfer  small part of the electric charge on a body to the electroscope.  

Trans inductance-transformer demonstration-consists of one mains coil 200 / 250 volts 50 hz 2400 turns. Two secondary coils are  provided which can be used one at a time. Number of turns are 65 and 130 giving outputs of 6 and 12 volts. Current capacity 2 amps, maximum. The secondary coils  have 4 mm socket terminals and the mains coil has electric cord and plug.  

Trans inductance-transformer demonstration-a transformer simple fitted on wooden base and the taping out on the base with the 4mm socket 2,4,6,8,10and12v, 2 amps its also call step down transformer.  

Trans inductance-induction coil-copper wire winding switch with make and break point discharge handle on wooden base with on and off switch long life contacts bigger models are enclosed in wooden case with lid.  

Trans inductance-ruhmkorff coil-the traditional induction coil capable of producing a spark length of up to 30mm with an input of 6 to 8 volts dc and is therefore ideal for use with vacuum tubes, eudiometers, etc. A fully adjustable trembler system is incorporated and spark suppression capacitors are housed in the base. A pair point electrode are supplied  with the instrument the point electrode having an insulating handle for adjustment of  the spark gap low voltage in put is via a pair of base board mounted 4 mm sockets.  

Trans inductance-thermocouple-single: - copper and constantan wires twisted together at one end and soldered. Length of leads coiled 50mm approx. Extended 500mm approx.  

Trans inductance-thermocouple-a number of copper and iron bars joined together. When the junctions of these wires  are heated and the ends are connected to a sensitive galvanometer, appreciable  deflection is observed.  

Trans inductance-deflection tube-with fluorescent screen. Horizontal tube fitted with fluorescent painted aluminium  plate, the cathode side of which is bent at right angles and provided with a slit.  cathode rays passing through the slit cast a sharp and bright image across the  aluminium plate. When magnet is brought near the cathode rays deflect violently.  

Trans inductance-geissler’S Tubes-Different shapes, different pressures, showing differing discharge phenomenon 8" long   in polished wooden show case with rotary switch for connections one at a time. 

Trans inductance-phosphorescent mercury tube-glass tube having inside striated bulb tube filled with mercury and neon gas. When  tilted falling mercury rubs against glass wall generates frictional electricity which is visible in bright red colour to glow to the naked eyes in darkness.  

Trans inductance-rectilinear propagation-V shaped tube to show cathode rays are generated only vertical lower electrode to  the cathode irrespective of the anode point (any of two electrode above).

Trans inductance-shadow effect-an object star obstructing the path of cathode rays casts its shadow on the  fluorescent painted wall facing cathode rays.  

Trans inductance-canal ray tube-horizontal type to show positive rays. The tube with two fused discs, one at each  end has perforated cathode in the centre. When one disc is made anode the positive  rays pass through holes in the cathode to the other side if the third spare electrode  which is bombarded by positive rays is connected to a negatively charged gold leaf  electroscope the same shall be immediately discharged through the spare electrode is  not actually connected to electrical circuit.  

Trans inductance-spectrum tubes-20 cm tubes 5 cm capillary in middle filled with spectrocopically pure gases working on 5 cm spark induction coil or 4. 5 kv high voltage transformer.  

Trans inductance-X-ray tube-for use with induction coil. Consists of a glass sphere with a concave disc electrode  which generates cathode rays and focuses on a tungsten target placed at an angle  of 45° at the inner end of arm exactly opposite.  

Electronics-instruments-millikan’S APP-Consisting of a heavy cast iron base which is mounted on a steel pillar that carries the microscope and the lamp house. The microscope can be adjusted smoothly by  slow motion screws in the horizontal as well as in the vertical direction. Automizer is  also fitted on the same carriage. The apparatus does not need any critical adjustment   and the oil drops appear in microscope with in seconds. Microscope is provided with  micro meter scale. 

Electronics-instruments-oscilloscope dual trace- 20MHz- 

Electronics-instruments-E/M by helical method-Specification:- Input :- 230 volts AC 50 c/s, E.H.T: - 1000 volts, DC output for  solenoid provided:- 30 volts DC at 1.5 Amps, with reversing switch.  Solenoid:- Dia 4" - 5", Length:- 20" wound on properly insulated former and fitted on nicely polished wood base. 

Electronics-instruments-single channel oscilloscope-single channel oscilloscope 10 MHz using 70 mm CRT

Electronics-instruments-pentode characteristic app-The instrument is designed to draw the characteristic of the pentode valve. It has  two built in power supplies. Four 65mm dia meters are provided to read different electrode volt/current. The pentode valve is fitted on board. The student have to  make the connection. Input:- 230 volts AC, H.T.1 (stabilised):- 0-300volts at 30mA, H.T.2:- 0-250 volts at 25mA, Bias:- 0-15 volts at 100mA, L.T:- 6.3 volts at 2 amps,  Built in a nicely box with on/off switch. jewel light etc. 

Electronics-instruments-transistor characteristic app-it consists of 3 meters one voltmeter, one microammeter and one milliammeter is used  in this apparatus in some experiments base voltage is not required so that by omitting  one voltmeter this unit comes in 3 meters.  

Electronics-instruments-charging & discharging of condenser-To study charging & discharging of condenser. The apparatus is used to find the  relationship between potential difference across a capacitor and time during charging and discharging. complete with built in power supply workable on 230 volt AC.

Electronics-instruments-U. J. T characteristic app-the instrument is designed to draw the characteristic curve of u. J. T. It has two power supplies of its own and four meters to draw input characteristic. Complete circuit diagram is provided on the front panel.  

Electronics-instruments- F. E. T transistor characteristic app-the instrument is designed to draw the characteristic of A f. E. T transistor its drain  current vs drain source voltage and vgs. Complete with circuit diagram.  

Electronics-instruments-variac-input :- 230 volts, output :- 0 - 270volts current :- 2Amp 

Electronics-instruments-E/M BY Thompson method-The apparatus is designed to work on 230 volts AC 50c/s . It has built in E.H.T supply.  New cathode ray tube is used to provided proper display. Very easy to handle and  compact in size. Specification: - Input:-230 volts 50 c/s, E.H.T: -800 volts at 10 mA, Deflection volts: 0-50 volts at 15 mA, L.T:- 6.3 volts at 2 Amp, Horizontal Deflection:- By bar magnet, Vertical Deflection:- By internal built in supply. provided with wooden stand deflection  magnetometer and pair of bar magnet. 

Electronics-instruments-transistor characteristic app-This apparatus is used to verify input, output and transfer characteristic of PNP and  NPN transistors in common emitter base mode. it is complete unit provided with all  components regulated power supplies, meters etc. to perform experiment. Features: - (a) Two built in continuously variable regulated power supplies. (b) Four moving coil type meters are provided to monitor voltage & current with their separate terminals for each meter. (c) Rugged construction compact unit provided with self explanatory USER’S manual (d) Special design of MS box with paint give maximum visibility for  scales of meters. (1) Common Emitter mode, (2) Common base mode. 

Electronics-instruments-to study logic gates-In built logic level 5 volts as 1-1 & 0-0 circuit diagram symbol are provided on the  front panel of each apparatus. connection leads are also supplied. working manual with truth table for each apparatus is also provided. based on TTL (Discrete components used) AND, OR, NOT, NOR, NAND, EX-OR, &  EX-NOR gates, provided with connection leads. 

Electronics-instruments-vacuum tube voltmeter-Specification: - AC voltage : - 0-1.5, 5, 15, 50, 150, 500, 1500 volts. DC voltage :-  0-15, 5, 15, 50, 150, 500, 1500 volts. Resistance:- 0-1K, 10K, 100K, 1M, 10M, 100M, 1000meg. ohms. Calibration Accuracy:- AC voltage ± 4% on all ranges. DC voltage ± 3% on all ranges. Resistance with in ± 2% on all ranges. Frequency Response:- with  in range of 50 c/s to 5 Mc/s flat. Input impedance:- DC voltage 11 M ohms on all   ranges for AC voltages 5M ohms in parallel with 25 P.F. Meter :- using 80 mm diameter. Source of supply:- 230 volts 50 c/s AC.

Electronics-instruments-audio oscillators-A) Wide range Sine/square/triangular Oscillator:- Frequency Range:- 1Hz to 1 MHz in six Decade step. Output voltage:- Sine wave 0-10 volt in three steps with  continuous variable. Square wave: - 0-15 p/p continuously variable. Distortion:- Sine  wave less than 0.5% between 100 Hz to 100 KHz. Output impedance:- 600 ohms. b) All ranges are available. 

Electronics-instruments-resistance in series-consist of milliammeter fitted in series with two resistance and 4mm sockets.   

Electronics-instruments-resistance in parallel-consists of two resistance fitted in parallel with voltmeter. 4 mm socket provided for batter supply.  

Electronics-instruments-ammeter connected in circuit-consists of ammeter with 1. 5 volt bulb fitted in circuit . 4 mm sockets are provided for battery.  

Electronics-instruments-voltmeter connected in circuit-consists of voltmeter with 1. 5 volt bulb fitted in circuit . 4 mm sockets are provided for battery.  

Electronics-instruments-ohms law app-consists of one voltmeter and one milliammeter. Two 4mm sockets terminals are provided for the connection of unknown resistance. The whole system is enclosed either in a  box.  

Electronics-instruments-digital ammeter-any range from 0 - 5 amps built in a colour box 

Electronics-instruments-battery eliminator-Battery eliminators are having full wave bridge and double wound transformers, using  copper wire and high grade lamination to avoid losses. They are built in a nicely  polished box having lock type terminals on/off switch, jewel light etc.  A) 2,4,6,8,10, 12 volts at 500 milli amps to 6 amps.

Electricity-motors-water turbine-a unit complete with two poles of magnets with armature and l e d fitted on wooden  base . A fan fitted in house of metal when the water /air will be passed with pressure  then the fan rotates with armature then LED will glow in red colour.  

Electricity-motors-motor-A model of the simplest form of D.C electric motor, having 2 pole armature wound with  enameled copper wire, & a permanent magnetic field provided by a removable magnet. The construction of the model is completely open and all components are readily  observable. A disc type commutator is incorporated and external connection to the phosphor bronze bushes is by means of a pair of 4mm sockets. The motor will  operated on 4 to 9 volts D.C 

Electricity-motors-motor-A model of the simplest form of D.C electric motor, having 2 pole armature wound with  enameled copper wire, & a permanent magnetic field provided by a removable magnet.  magnet. The construction of the model is completely open and all components are  readily observable. A disc type commutator is incorporated & external connection to  the phosphor bronze bushes is by means of a pair of 4mm sockets. The motor will  operated on 4 to 9 volts D.C .  

Electricity-motors-motor-constructed of cast iron with 3 pole armatures that run freely on 4 to 9 volt DC. Complete fitted on wooden base and having a small fan / color disk.  

Electricity-motors-motor-Constructed of iron strips with 2 pole armatures that run freely on 4 to 9 volt DC and removable magnet . complete fitted on base and having a small pulley. 

Electricity-motors-metal electric generator-dynamo with wheel to generate direct current ac. Mounted on metal base with driving wheel, lamp holder and bulb. All parts are in metal.  

Electricity-motors-electric generator-dynamo with wheel to generate direct current AC, DC and motor. Mounted on wooden  base with driving wheel, lamp holders and bulbs. Complete with 2 mm sockets & leads.  

Electricity-motors-electric generator-dynamo with wheel to generate direct current AC, mounted on wooden base with driving wheel, lamp holder and bulb.  

Electricity-motors-bicycle dynamo-dynamo with wheel to generate direct current ac, mounted on wooden base with  driving wheel, lamp holder and bulb.  

Electricity-motors-electric generator-this model uses the same basic assembly as the motor but mounted on base plate  which also carries a hand drive pulley to the smaller dynamo pulley by a rubber belt to  to give a step up ratio of approximate 9:1 electrical output is via a pair of 4 mm  sockets, and led mounted in a holder, the model may also be used as a motor on  4 to 9 volts dc supply.  

Electricity-motors-water turbine-A unit complete with horse shoe magnet with armature and L E D fitted on wooden base . A fan fitted in house of metal when the water /Air will be passed with pressure   then the fan rotates with armature then LED will glow in red colour.  

Electricity-motors-water turbine-A unit complete with two poles magnet with armature and L E D fitted on metal base .  A fan fitted in house of metal when the water /Air will be passed with pressure then  the fan rotates with armature then LED will glow in red colour.  

Electricity-motors-bell in bell jar-enclosed in a bell jar fitted with connections, for use with an air pump to show that  sound is not transmitted in vacuum.