Electricity & Magnetism Manufacturer, Suppliers and Exporter in India
School Instrument India is leading Electricity & Magnetism Manufacturer,and supplier and Exporter in India, Algeria (Algiers), Angola (Luanda), Argentina (Buenos Aires), Armenia (Yerevan), Australia(Canberra), Austria (Vienna), Bahrain (Manama), Bangladesh (Dhaka), Bhutan (Thimphu), Bolivia (Sucre), Botswana (Gaborone), Brazil (Brasília), Brunei (Bandar Seri Begawan), Montenegro (Podgorica), Morocco (Rabat), Mozambique (Maputo), Myanmar (Naypyidaw), Namibia (Windhoek), Nepal (Kathmandu), New Zealand (Wellington), Nigeria (Abuja), Oman (Muscat), Palestine (Ramallah), Panama (Panama City), Papua New Guinea (Port Moresby), Paraguay (Asunción), Peru (Lima), Philippines (Manila)¸ Portugal (Lisbon), Qatar (Doha), Rwanda (Kigali), Saudi Arabia (Riyadh), Senegal (Dakar), Serbia (Belgrade), Sierra Leone (Freetown), Slovakia (Bratislava), South Africa (Cape Town) (Pretoria) (Bloemfontein), South Sudan (Juba), Spain (Madrid), Sri Lanka (Sri Jayawardenepura Kotte) (Colombo), Sudan (Khartoum), Syria (Damascus), Tanzania (Dodoma), Thailand (Bangkok), Togo (Lomé), Tonga (Nuku'alofa), Trinidad and Tobago (Port of Spain), Tunisia (Tunis), Turkey (Ankara), Turkmenistan (Ashgabat), Uganda (Kampala), United Arab Emirates (Abu Dhabi), United Kingdom (London), United States (Washington, D.C.)
Written by Palak Mall, Senior Content Writer · reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years · page updated 14 October 2026
Electricity & Magnetism on School Instrument India lists 166 items for school and college physics laboratories across nine sub-ranges, from 4 mm leads and plug keys through to Wheatstone bridges, tangent galvanometers, demountable transformers and electrostatic generators. The largest single sub-range is not apparatus at all — it is the 36-item Compasses and Components group of leads, plugs, keys and wire that every other experiment depends on. All dimensions, materials and ratings quoted below are the figures printed on the linked product pages.
The nine sub-ranges
| Sub-range | Items | What it covers |
|---|---|---|
| Compasses and Components | 36 | Connection hardware: banana plugs and sockets, flexible leads, crocodile clips, plug and telegraph keys, knife and reversing switches, lamp holders, cell holders, bare copper, constantan and manganin wire, plotting and pocket compasses. |
| Electromagnetism | 35 | Motors, dynamos, transformers, induction coils, electromagnets, solenoids, relays and field-demonstration apparatus. |
| Electrostatics | 21 | Wimshurst and Van de Graaff generators, electroscopes, Faraday ice pails, electrophorus, Leyden jar, friction rods and cloths, conductors. |
| Meter and Radiations | 17 | Tangent, ballistic and reflecting galvanometers, demonstration meters and spare scales, dual-scale ammeter and voltmeter, digital multimeter, cathode-ray demonstration tubes. |
| Electrochemistry | 12 listed | Daniell and Leclanché cells, Hoffman electrolysis apparatus, pH-type electrolysis cell, electrode sets and simple cell plates in carbon, copper, lead and zinc. |
| Magnetism | 13 | Dip circles and needles, magnetic field chambers and demonstration plates, magnetic squares, material sheets, metal discs, strips and rods. |
| Resistance | 13 | Post Office boxes, two- and four-gap Wheatstone bridges, resistance boxes in constantan and manganin, resistance coils, rheostats, single-wire potentiometer, platinum resistance thermometer, thermistor. |
| Magnet | 12 | Bar, cylindrical, ring, horseshoe and U-shape magnets in steel and Alnico, magnet sets, magnet balls, suspension and stirrup. |
| Circuit | 6 | Circuit board kits, an electricity kit, decade capacitance and inductance boxes, capacitance substitution box, variable capacitor. |
The Four-Layer Bench
An electricity laboratory fails for a predictable reason: the apparatus arrives and the connection hardware does not. The 166 items in this range sort into four layers, and a lot is only usable when all four are specified together. The bottom layer is the one most often under-ordered, even though it is the largest sub-range on the site.
| Layer | What it is | Where it sits in this range |
|---|---|---|
| 1. Connection | Leads, plugs, sockets, keys, switches, holders and wire — consumed and lost continuously, needed in multiples per bench | Almost all of Compasses and Components, 36 items. Wire is listed bare in copper, constantan and manganin, and insulated in copper. |
| 2. Source | Cells, electrolysis apparatus, induction coils and generators that supply current or charge | Electrochemistry, plus the induction coil and the electrostatic generators. |
| 3. Demonstration | The apparatus the experiment is actually about — motors, transformers, electromagnets, field apparatus, electroscopes | Most of Electromagnetism and Electrostatics. |
| 4. Measurement | Instruments that read the result: galvanometers, meters, bridges, potentiometers | Meter and Radiations and Resistance, 30 items between them. |
A practical test when reviewing a draft order: count the 4 mm leads against the number of benches. Items such as the Daniell cell and the gold leaf electroscope are listed with 4 mm socket terminals, so the leads are not optional accessories but part of the working item.
Matching the measuring instrument to the experiment
Four measuring instruments in this range are often treated as interchangeable and are not. Each reads a different quantity in a different way.
| Instrument | Reads | Construction as listed |
|---|---|---|
| Tangent Galvanometer | Current, by deflection against the earth's horizontal field | Circular coil on a non-magnetic bakelite bobbin about 160 mm in diameter, mounted vertically on a non-magnetic cast metal base, coil width small compared with its diameter, three windings of enamelled copper wire of differing thicknesses. |
| Ballistic Galvanometer | Quantity of charge in a transient pulse, rather than steady current | For measurement of small quantities of electrical charge. Levelling screws for balancing the coil, rigid bakelite case, clamping arrangement for transportation, listed as holding consistent sensitivity over a long period. |
| Digital Multimeter | Volts, ohms, resistance and current, plus transistor and diode testing | Large 3½-digit LCD display, overload protection, supplied with battery, test leads and instructions. Listed as suited to introductory electronics courses. |
| Dip Circle | The angle of dip of the earth's magnetic field at a location | Needle and scale in a non-magnetic metal casing with a glass window, both rotating about a vertical axis on a cast metal base, vertical rotation read directly from a graduated circular scale on the base. |
Resistance measurement: four approaches
| Apparatus | Method | Detail as listed |
|---|---|---|
| Post Office Box, Wheatstone Bridge | Decade-dial bridge for accurate unknown resistance, or comparison of two or more conductors | Resistance wire coils, double silk covered, wound non-inductively. Two enclosed tapping keys for battery and galvanometer. Decade dial type with six dials. |
| Potentiometer, Single Wire | Potential divider, null-point detection | Works on the variation of a conductor's resistance with length. Terminating strips with heavy-duty 4 mm socket terminals, assembly mounted on a long baseboard. |
| Resistance Thermometer, Platinum | Temperature by resistance, using a bridge method such as a Carey Foster bridge | A length of fine platinum wire wound non-inductively on a mica frame and soldered to copper leads. |
| Wheatstone Bridge, 4 Gaps and 2 Gaps | Classic bridge comparison | Listed in two variants in the Resistance sub-range, alongside resistance boxes in constantan and manganin, resistance coils, a rheostat, a spare jockey and a thermistor demonstration unit. |
Electrostatic generators and charge demonstrations
- Wimshurst Machine — listed as generating high electrostatic potentials producing a spark up to 75 mm, overall dimensions 450 x 175 x 500 mm.
- Van de Graaff Generator, motor driven — for experiments needing a continuous high-voltage source. The dome is listed as smooth and polished, free of surface imperfections and without sharp corners or edges, to minimise charge leakage; the motor-driven assembly is encased in a metal box.
- Faraday Ice Pails — demonstrates that charge resides only on the outer surface of a hollow conductor. Four nesting aluminium cylinders on insulating feet, 150 x 120 mm, 120 x 110 mm, 90 x 90 mm and 75 x 75 mm (diameter x height).
- Gold Leaf Electroscope — single gold leaf on an insulating bush in a metal case with a 4 mm socket earthing terminal, clear front window and ground-glass rear window on a bakelite base, with two interchangeable electrodes including a 50 mm disc top plate.
- Electrophorus and the friction rods and cloths sets — the simplest charge-generation route, for classes without a machine.
Electromagnetism: coils, transformers and kits
- Demountable Transformer — pole pieces accept support rods and a shading ring, and may be clamped at any separation on the U-core or in contact. One end is shaped to part of a cone for maximum flux density, with a hole drilled through its length along the cone axis to take a light beam.
- Induction Coil, 100 mm spark — produces high-voltage alternating current or high-voltage pulses from a low-voltage DC source. Adjustable vibrator system, primary current polarity reversal, on-off switch, enclosed condenser and special alloy contacts.
- Electromagnetic Kit, Westminster — a single kit covering magnetic field due to electric current, simple galvanometers, electromagnets, vibrators and forces on currents in magnetic fields. Suited to schools wanting one box rather than separate pieces.
- Lenz's Law Apparatus — shows Faraday's law of induction and Lenz's law: passing a magnet through a complete loop moves the device, while a split loop produces no movement at all.
- Hoffman Electrolysis Apparatus — operates from a 9 V battery or DC supply, with a black acrylic panel listed as reducing corrosion and the chance of breaking the glassware in use or storage.
Circuit kits for class sets
Two kits in the Circuit sub-range serve class teaching rather than demonstration. The Electricity Kit is listed as an alternative to the circuit board for simple-circuit investigations, usable by a group of up to 12 students, with panels connected into circuits using 4 mm stackable leads. The Worcester Circuit Board Kit follows the standard circuit board but adds steel wool, battery clips built onto the tray, extra bulbs, a wooden disc, a copper plate, diodes and rolls of wire in place of mounted wire. For a class set, the stackable leads in Compasses and Components need ordering in quantity alongside either kit.
How to specify an electricity and magnetism lot
Specify this range by layer rather than by item, using the Four-Layer Bench above, and state the number of benches and the class size so quantities for the connection layer can be worked out. The ordering pages list institutional purchase orders, bank transfers and government e-tender payments as accepted from schools, colleges, universities and training institutions in India. The company also states supply to institutions in Asian, African and Middle Eastern markets. Tendered requirements are submitted on the Tenders page.
Two points worth settling in the enquiry. First, several items in the Meter and Radiations sub-range are spare scales for demonstration meters rather than meters themselves, so the meter and its scales should be listed separately. Second, the galvanometer required by the Post Office box is not supplied with it and sits in a different sub-range.
Related supply groups
- Heat & Thermodynamics — calorimetry, thermal conductivity and expansion apparatus, including the mains-powered items that share a bench supply with this range.
- Light & Optics — benches, lenses, mirrors, prisms and spectrometers.
- Mechanics and Fluid Mechanics — motion, pulleys, balances and the properties of matter.
- Educational Lab Equipment — the broader school and college range.
- Contact — for sending a list of items and quantities to be quoted.
Questions buyers ask
How many items are in the Electricity & Magnetism range?
166 across nine sub-ranges. The largest are Compasses and Components with 36 and Electromagnetism with 35, followed by Electrostatics with 21 and Meter and Radiations with 17.
Which electrostatic generator gives the longer spark?
The Wimshurst machine is listed as producing a spark up to 75 mm, with overall dimensions 450 x 175 x 500 mm. The motor-driven Van de Graaff generator is listed instead for experiments needing a continuous high-voltage source rather than for spark length, with a polished dome free of sharp corners to minimise charge leakage.
What is the difference between the tangent and ballistic galvanometers?
The tangent galvanometer reads steady current by deflection against the earth's horizontal field, using a coil of about 160 mm diameter on a non-magnetic bakelite bobbin with three windings of different wire thicknesses. The ballistic galvanometer is for measuring the charge in a transient pulse instead. They are not substitutes for one another.
Which apparatus measures an unknown resistance most precisely?
The Post Office box is the decade-dial bridge listed for accurate determination of unknown resistance and comparison of conductors, with non-inductively wound double-silk-covered coils and two enclosed tapping keys for battery and galvanometer. A galvanometer is needed with it and is listed separately.
Are leads and plugs supplied with the apparatus?
Generally no. Items such as the Daniell cell and the gold leaf electroscope are listed with 4 mm socket terminals, and the leads, banana plugs, crocodile clips and stackable plugs that connect to them are listed separately in Compasses and Components. Order them per bench, in quantity.
Is there a single kit for electromagnetism experiments?
Yes. The Westminster Electromagnetic Kit is listed as containing the components for the basic electromagnetism experiments, including simple galvanometers, electromagnets and vibrators, covering magnetic field due to electric current and forces on currents in magnetic fields.
Request a quotation
Send the item names, codes and quantities through the contact page, together with the number of benches and the class size, and a quotation covering packing and despatch will be returned against that list. Quantities for the connection layer are easier to get right at quotation stage than after delivery. Copies of current ISO certificates are available from School Instrument India on request.
