Resistance Coil 1 Ohm

Product Code : SCL-AM-12115

Resistance Coil 1 Ohm (SKU SCL-AM-12115) is a known 1 Ω standard resistor: manganin wire wound non-inductively on a heat-resistant bobbin inside a clear protective case, with two 4 mm terminals. It gives students a stable reference value for Ohm's law, series-parallel and bridge circuits in school and college physics labs. Science Lab Supplies is the maker, producing the coil at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and supplying it to schools, colleges and distributors without intermediaries.

Specifications

Every specification of the coil is listed in the table below. Put simply, it is a 1 Ω ±1% resistor of high-stability manganin wire in a bifilar, non-inductive winding, housed in a transparent cylindrical case of clear acrylic or impact-resistant polymer and connected through two colour-coded brass binding posts.

Applications and Experiments for the 1 Ohm Resistance Coil

A fixed, accurately known resistance is the starting point for many electrical practicals. Because manganin hardly changes with temperature and the bifilar winding cancels self-inductance, the coil holds its 1 Ω value through a lesson, making it a dependable part of physics lab equipment in India for school and college circuits.

• Class 10 and 12 physics: verifying Ohm's law, with the current set by a Rheostat, Constantine (Eureka) Wire and switched by a Brass One Way Plug Key.
• Known resistance in meter bridge, Wheatstone bridge and potentiometer experiments.
• Building series and parallel combinations to check equivalent resistance.
• B.Sc. labs: checking the current readings of meters against a known resistor.

Keep currents low: a sustained high current heats the wire and can permanently shift its value. Keep the coil dry and avoid dropping it.

Standard Scope of Supply

You receive one Resistance Coil 1 Ohm with its integrated 4 mm binding posts and a technical data sheet showing its temperature coefficient profile. Power supplies, meters, keys and connecting leads are separate products and are not included, though they can be added to the quotation.

Packing, MOQ and Lead Time

Prices can be requested for one coil or for a set for every electricity bench. The Science Lab Supplies quotation names the packing, delivery time and price for your quantity, and resistance boxes, rheostats or bridges for the same practicals can be listed with it.

Because Science Lab Supplies holds an Importer-Exporter Code, it can ship to buyers in Qatar, Sri Lanka, Vietnam, Malaysia, Peru and Egypt. Ask for a quote on the contact page or through the enquiry cart; the lab tender page explains supply against tenders.

Frequently Asked Questions

What does non-inductive winding mean on the Resistance Coil 1 Ohm?
The manganin wire is doubled back on itself before it is wound, so current flows in opposite directions in neighbouring turns. Their magnetic fields cancel, leaving almost no self-inductance in DC or AC measurements.

Why is manganin used for this coil?
Manganin has an exceptionally low temperature coefficient of resistance, so the coil keeps its 1 Ω rating even if it warms slightly while current flows during an experiment.

How can I check the coil's value?
Measure it on a digital multimeter set to a low resistance range, or place it in a Wheatstone bridge or meter bridge against a known standard and confirm it reads 1 Ω within ±1%.

Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies manufactures the coil. It is wound and assembled at the company works in Saha, Ambala, India, so pricing and supply terms come straight from the producer.

Related Resistance and Circuit Apparatus

These Applied Mechanics, Electrical and Electronics and Lab Meters products share the same resistance and Ohm's law practicals, from a variant coil and resistance boxes to bridges and resistance wire, so a complete electricity bench for the laboratory can be quoted together.

• Resistance Coil Unit 1 Ohm — 1 Ω ±1% manganin unit with nickel-plated brass posts on a base plate.
• Resistance Box Plug Type (Constantan / Manganin Coil) — plug-type box with coils on bakelite spools in a wooden box.
• Decade Resistance Box, Dial Type — metal film decades in two, three or four dials.
• Meter Bridge or Wheatstone Bridge With Pencil Jockey — copper-strip bridge on a 3/4 inch laminated base with nine lock-type brass terminals.
• Potentiometer with Jockey Pencil — wooden base, brass blocks and a 100 cm scale.
• Ohms Law Apparatus — two moving-coil meters and a wire-wound potentiometer in a metal box.
• SWG Manganin Wire (100g) Spoolm — bare manganin wire for winding further resistors.

Browse the full Applied Mechanics range, the Electrical and Electronics range for resistance boxes and keys, or all physics lab equipment.

Last updated: 9 October 2026