Ohms Law Apparatus
Product Code : SCL-EAE-11337
The Lab Exports Ohms Law Apparatus combines two moving-coil meters with a wire-wound potentiometer and selectable low-voltage supply settings. The apparatus has a 5 V voltmeter and a 500 mA milliammeter for observing potential difference and current during a controlled resistance experiment.
The components are mounted in a spray-painted metal box. A circuit diagram printed on the front panel supports correct setup, while 4 mm socket terminals provide connections for the DC supply and unknown resistance. This integrated layout is suitable for repeated student practicals and teacher demonstrations.
Key Features
5 V voltage measurement: The integrated moving-coil voltmeter has a published range of 5 V.
500 mA current measurement: The moving-coil milliammeter measures current up to 500 mA.
Selectable supply levels: Provides 1.5 V, 3 V and 4.5 V settings for taking multiple readings.
Controlled adjustment: A wire-wound potentiometer allows the experimental circuit to be adjusted.
4 mm socket terminals: Dedicated terminals support connection of the DC supply and unknown resistance.
Integrated circuit guide: The front-panel circuit diagram helps students identify the required connections.
Metal enclosure: The apparatus is mounted in a spray-painted metal box for laboratory handling.
Front-panel control: An ON/OFF switch allows the apparatus to be isolated before connections are changed.
Technical Specifications
|
Specification |
Detail |
|
Product name |
Ohms Law Apparatus |
|
Brand |
Lab Exports |
|
Product code |
EL-LM-10394 |
|
Product category |
Physics Laboratory Equipment – Lab Meters |
|
Voltmeter |
Moving-coil meter, 5 V range |
|
Milliammeter |
Moving-coil meter, 500 mA range |
|
Supply settings |
1.5 V, 3 V and 4.5 V |
|
Variable component |
One wire-wound potentiometer |
|
Connections |
4 mm socket terminals |
|
Power component |
Step-down transformer |
|
Enclosure |
Spray-painted metal box |
|
Front-panel features |
ON/OFF switch and printed circuit diagram |
|
Product-specific certification |
No product-specific certification verified |
What's Included in the Kit
1 × Ohms Law Apparatus in a metal enclosure
1 × Moving-coil voltmeter, 5 V
1 × Moving-coil milliammeter, 500 mA
1 × Wire-wound potentiometer
1 × Step-down transformer arrangement
4 mm socket terminals for the supply and unknown resistance
Lead wire
Applications / Uses
Verifying Ohm’s law for a suitable resistance.
Measuring potential difference and circuit current.
Calculating resistance using R = V/I.
Plotting voltage-current characteristic graphs.
Studying proportionality between voltage and current.
Teaching correct voltmeter and ammeter connections.
Comparing an unknown resistance with calculated results.
How to Use the Ohms Law Apparatus
Place the apparatus on a clean, dry and stable laboratory bench.
Keep the ON/OFF switch in the OFF position.
Follow the circuit diagram printed on the front panel.
Connect the unknown resistance to its designated 4 mm terminals.
Set the potentiometer to its minimum-output position.
Switch on the apparatus and select the lowest available voltage.
Record the corresponding voltmeter and milliammeter readings.
Repeat the measurement at the other available voltage settings.
Calculate resistance using R = V/I and plot the V-I graph.
Switch off the apparatus before disconnecting the circuit.
Safety note: Do not exceed 5 V on the voltmeter or 500 mA through the milliammeter. Never connect the milliammeter directly across the supply or alter wiring while the apparatus is switched on.
Care & Maintenance
Disconnect the apparatus from the supply before cleaning or inspection.
Clean the meter windows, panel and enclosure with a soft, dry cloth.
Store the apparatus in a dry cabinet away from moisture and impact.
Inspect terminals and lead wires before each practical session.
Why Choose Lab Exports
Lab Exports manufactures, supplies and exports scientific and educational laboratory equipment for institutional users. Its range includes physics instruments, laboratory meters, electrical experiment setups, science kits and STEM teaching apparatus. The company supports bulk supply and OEM requirements for domestic and international buyers. Product quantities, packing details and destination-specific documentation should be confirmed in the final quotation.
Frequently Asked Questions
What is an Ohms Law Apparatus used for?
It is used to measure voltage and current in a resistive circuit and experimentally verify the equation V = IR.
What are the meter ranges?
The apparatus has a 5 V moving-coil voltmeter and a 500 mA moving-coil milliammeter.
Which voltage settings are available?
The published supply settings are 1.5 V, 3 V and 4.5 V.
Can students calculate an unknown resistance?
Yes. Students can calculate resistance by dividing the measured voltage by the measured current, provided consistent SI units are used.
Why is the ammeter connected in series?
The ammeter must carry the same current as the test resistance. Connecting it across the supply can create a damaging high-current path.
Is the apparatus suitable for school laboratories?
Yes. It is suitable for supervised electricity experiments in schools, colleges and technical training laboratories.
Request a quotation for the Ohms Law Apparatus or explore the physics laboratory meters range, electrical and electronics laboratory equipment, physics laboratory equipment and the Ohms Law Kit with built-in power supply.
Suggested Product Image ALT Text
Ohms Law Apparatus with 5 V voltmeter and 500 mA milliammeter
Lab Exports Ohm’s law apparatus in a spray-painted metal box
Physics laboratory apparatus with moving-coil voltage and current meters
Ohm’s law experiment setup with potentiometer and 4 mm terminals
