Resistance Box
Product Code : LSK-PL-10366
Resistance Box (SKU LSK-PL-10366), also called a decade resistance box, lets students dial in a known resistance in decade steps through a pair of 4 mm spin-free terminals. It is a standard instrument for bridge, potentiometer and meter experiments in senior secondary and college physics and in electrical labs. As a science apparatus manufacturer in India, Science Lab Supplies makes the box at Plot 448, HSIIDC Industrial Area, Saha, Ambala, and supplies it direct to schools, colleges, tender contractors and distributors.
Specifications
Resistance is set in decades on the dials, and boxes are made with 3, 4, 5 or 6 dials to cover different ranges. Each step can dissipate 1 W. Resistors are calibrated to better than 1% accuracy, except the 0.1 steps, which are within 5%. An earth terminal is fitted to the housing.
| Parameter | Value |
|---|---|
| SKU | LSK-PL-10366 |
| Type | Decade resistance box |
| Dial versions | 3, 4, 5 and 6 dial boxes |
| Power per step | 1 W |
| Accuracy | Better than 1%; 0.1 steps within 5% |
| Terminals | Pair of 4 mm spin-free terminals for low-resistance connection |
| Earth | Earth terminal on housing |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Resistance Box
A resistance box provides a known, adjustable resistance, so it serves as the standard arm of a bridge, a series resistor for a galvanometer or a variable load. It appears throughout NCERT Class 12 physics practicals and in B.Sc. and diploma electrical measurement work.
- Class 12 physics (CBSE/NCERT): metre bridge experiment to find an unknown resistance.
- Class 12 physics: finding the resistance of a galvanometer by half-deflection and converting it into a voltmeter.
- B.Sc. physics: Wheatstone bridge, Carey Foster bridge and potentiometer experiments.
- Diploma and ITI electrical labs: verifying Ohm's law and series and parallel combinations.
Standard Scope of Supply
The Resistance Box is supplied as a single decade box with its dials, two 4 mm spin-free terminals and an earth terminal. The number of dials and the range are confirmed on your quotation; connecting leads are a separate item.
Packing, MOQ and Lead Time
Tell us the number of dials and range you need, and whether you want one box or a set for every bench. The quotation then lists packing, delivery time and price for that quantity.
Science Lab Supplies is registered as an exporter with an Importer-Exporter Code and is able to ship to buyers in Tanzania, Uganda, the UAE, Saudi Arabia, Oman and the Philippines. Use the contact page for specific questions, the enquiry cart for a full item list, and the lab tender page for tender quotations.
Frequently Asked Questions
Which dial configurations are available?
Boxes are made with 3, 4, 5 or 6 dials covering different ranges. State the number of dials and range you need when you ask for a quotation.
How accurate are the resistors?
Each resistor is calibrated to better than 1%, except the 0.1 steps, which are within 5%. Each step can dissipate 1 W.
What connections does the box have?
A pair of 4 mm spin-free terminals gives a low-resistance connection, and an earth terminal is fitted to the housing.
Is the Resistance Box made in-house?
Yes. Science Lab Supplies manufactures it in its own Saha, Ambala, India factory. It is the maker, not a trading firm, so every quotation comes from the factory.
Related Resistance and Bridge Apparatus
Bridge and potentiometer experiments combine a resistance box with other variable components and a complete bridge set. These four items from the same physics range fill out that bench and can be quoted with the resistance box.
- Resistance Substitution Box — 12 switched resistors, 1 W each, via rotary switch.
- Capacitance Substitution Box — rotary-selected capacitors from 100 pF to 1 µF.
- Rheostat — 10 Ω high-power rheostat with 4 mm safety sockets.
- Winston Bridge Kit — bridge kit with digital meters, rheostat and leads.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
