Ohm's Law Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-PL-12407
Jlab Export is a leading Ohm's Law Apparatus Manufacturer,and suppliers in India
Ohm’s Law Apparatus (code EL-PL-12407) is a self-contained circuit for verifying Ohm’s law, combining a voltmeter reading to 5 V, a milliammeter reading to 500 mA, a wire-wound potentiometer and 4 mm sockets for the resistor under test behind a front panel printed with the circuit diagram. JLab manufactures it in Ambala, India, and includes a step-down transformer and lead wire.
Specifications
| Parameter | Detail |
|---|---|
| Model | JL337/067 |
| Meters | Two moving coil meters: voltmeter 5 V and milliammeter 500 mA |
| Voltage control | Wire-wound potentiometer |
| Sockets | Two 4 mm sockets for the unknown resistance; two 4 mm sockets for the DC supply |
| Front panel | Printed circuit diagram and ON/OFF switch |
| Supplied with | Step-down transformer and lead wire |
| Quality check | Each apparatus is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-PL-12407 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Taking V–I Readings
Connect the resistor to be tested across its pair of sockets and the supply to the DC sockets, then switch on at the panel. Turning the potentiometer raises the voltage across the resistor in steps; at each step note the voltmeter, which reads the voltage across the resistor, and the milliammeter, which reads the current through it. Because both meters are wired in, students can concentrate on the readings instead of building the circuit.
From the Graph to the Resistance
For a metallic resistor at steady temperature, a graph of voltage against current is a straight line through the origin, which is what Ohm’s law states. Its gradient is the resistance, R = V / I; convert the milliamp readings to amperes first so the answer comes out in ohms. Keep each reading brief and stay within the 500 mA scale: a metal resistor that warms up gains resistance, and the graph starts to curve.
Related Current Electricity Items
- Resistance Box — brass plug-type box giving known resistances to test.
- Rheostat 30 Ohm — sliding rheostat for varying current in a circuit built on the bench.
- Voltmeter — separate DC voltmeter for students wiring their own Ohm’s law circuit.
- Milliammeter — DC milliammeter with zero adjustment for bench circuits.
Meters, keys and resistors for electricity practicals are collected under Physics Lab.
Request a Quote
Send an enquiry through the contact page, or select Add To Cart; state the number of apparatus required, model JL337/067 and where the order is going.
Last updated: 26 October 2026
