The Reversing Key Commutator is a physics laboratory switching accessory used for reversing the direction of current through a selected circuit branch without manually interchanging connecting wires. It is intended for students, physics teachers and laboratory users performing electricity and magnetism experiments that require repeatable current reversal and comparison of readings.
Product Description
The STEMAids Reversing Key Commutator supports electrical practical work in which the polarity or direction of current through an experimental component must be changed systematically. By changing the key position, an appropriately wired reversing arrangement changes the direction of current through the connected section of the circuit.
This function is useful in experiments involving tangent galvanometers, magnetic-field measurements and other laboratory circuits where observations are taken for opposite current directions. The exact number of terminals, contact arrangement, switching positions, contact metal, base material and electrical rating of this STEMAids product are . Explore related Electrical and Electronics apparatus.
Key Features
- Current-direction reversal: enables an appropriately connected circuit branch to be operated with current in either direction.
- No repeated rewiring: allows polarity reversal without manually swapping circuit leads during every observation.
- Physics practical support: suitable for experiments requiring comparative readings with opposite current directions.
- Galvanometer applications: can support tangent-galvanometer and related magnetic-field practicals when specified in the experiment.
- Repeatable switching: helps students change circuit configuration consistently during repeated measurements.
- Low-voltage laboratory use: intended for educational electrical circuits subject to the confirmed rating.
- Construction details: terminal quantity, contact system, base construction and ratings are .
Technical Specifications
|
Specification |
Detail |
|
Product Name |
Reversing Key Commutator |
|
Brand |
STEMAids |
|
Product Type |
Physics laboratory reversing switch / commutator accessory |
|
Primary Function |
Reversing current direction in a selected circuit section |
|
Capacity |
Not applicable |
|
Product-Specific Certification |
None verified |
What’s Included in the Kit
- Reversing Key Commutator assembly
- Electrical terminals
- Manual switching or key mechanism
- Insulating or supporting base
- Connecting leads
- Instruction sheet
Applications / Uses
- Reversing current in tangent-galvanometer experiments.
- Electricity and magnetism laboratory practicals.
- Experiments comparing observations for opposite current directions.
- Magnetic-field and current-direction demonstrations.
- Low-voltage circuit training in school and college laboratories.
- Supporting repeatable electrical measurements without repeated rewiring.
- Complementing STEMAids Measuring Instruments.
How to Use the Reversing Key Commutator
- Disconnect the laboratory power source before wiring the experiment.
- Connect the commutator according to the approved circuit diagram for the practical.
- Check that all terminals and leads are secure.
- Set the reversing key to the first specified position.
- Energize the low-voltage circuit and record the required observation.
- Operate the commutator to reverse current through the selected circuit section.
- Record the observation for the reversed-current condition.
- Disconnect the power source after completing the experiment.
Safety note: Use only within the confirmed voltage and current rating of the commutator. Do not change connections while handling exposed energized terminals, and do not use the apparatus for mains-voltage switching unless the manufacturer explicitly specifies such use.
Care & Maintenance
- Keep electrical contacts clean and dry.
- Operate the switching mechanism without excessive force.
- Inspect terminals regularly for looseness, oxidation or mechanical damage.
- Store the commutator in a dry laboratory cabinet when not in use.
Why Choose STEMAids
STEMAids is the STEM education brand of Eduscope Smart Learning Solutions Private Limited, a New Delhi-based manufacturer of STEM kits and educational laboratory equipment. Its Physics range covers electricity and magnetism, measuring instruments, circuit apparatus and other school and college laboratory equipment. The company publishes ISO 9001:2015 certification, Udyam manufacturing registration and an active Importer-Exporter Code. Browse related Physics General Items and the broader Physics Laboratory Products range.
Frequently Asked Questions
What is a Reversing Key Commutator used for?
It is used to reverse the direction of current through a selected section of a laboratory circuit without repeatedly interchanging connecting wires.
Why is a reversing key used in a tangent galvanometer experiment?
It allows the current through the tangent-galvanometer coil to be reversed so readings can be taken for both current directions. Comparing or averaging such readings can help reduce certain setup-related observational errors.
Is a reversing key the same as a motor commutator?
No. A laboratory reversing key is a manually operated switching device. A motor or generator commutator is a rotating electromechanical component associated with the armature of a DC machine.
How many terminals does a reversing key have?
The terminal count of this exact STEMAids product has not been verified. It should be published only after checking the approved product specification.
Can it be used in low-voltage magnetic experiments?
Yes, when the experiment requires current reversal and the circuit operates within the confirmed electrical rating of the key.
Does the Reversing Key Commutator have certification?
No product-specific certification has been verified. Manufacturer-level certifications should not automatically be represented as certification of this individual laboratory accessory.
