Single Circuit Plug Key

The Single Circuit Plug Key is a physics laboratory electrical accessory used for manually opening and closing a single circuit path. It is intended for students, physics teachers and laboratory users who need straightforward current control during low-voltage electricity, resistance, bridge and other basic circuit experiments.

Product Description

The STEMAids Single Circuit Plug Key supports practical electrical experiments where a circuit must be connected only when a reading or observation is required. In a conventional plug-key arrangement, inserting a conductive plug bridges separated contacts and completes the electrical path.

Removing the plug opens the circuit and stops current through that path. The exact terminal arrangement, number of plugs, contact material, plug material, base construction, voltage/current rating and dimensions of this STEMAids product are . Explore related Electrical and Electronics laboratory apparatus.

Key Features

• Single-circuit control: provides manual opening and closing of one electrical circuit path.
• Simple plug operation: uses plug insertion or removal to control electrical continuity in the conventional arrangement.
• Physics practical support: suitable for low-voltage electricity experiments where a circuit key is specified.
• Controlled current duration: allows the circuit to remain open between measurements or observations.
• Fundamental circuit learning: demonstrates open-circuit and closed-circuit conditions directly.
• Resistance experiment support: can be incorporated into suitable Ohm’s law, bridge and resistance experiments.
• Construction specifications: terminal layout, materials and electrical ratings are .

Technical Specifications

What’s Included in the Kit

• Single Circuit Plug Key assembly
• Conductive plug
• Electrical contacts
• Connection terminals 
• Insulating or supporting base 
• Connecting leads or instruction sheet 

Applications / Uses

• Opening and closing low-voltage physics laboratory circuits.
• Ohm’s law experiments.
• Resistance-measurement practicals.
• Metre bridge and bridge-circuit work where a key is specified.
• Basic current and voltage experiments.
• Teaching electrical continuity and open/closed circuit conditions.
• Complementing STEMAids Measuring Instruments.

How to Use the Single Circuit Plug Key

1. Disconnect the laboratory power source before assembling the experiment.
2. Connect the plug key at the position shown in the approved circuit diagram.
3. Check that the terminals and leads are securely connected.
4. Insert the conductive plug into the designated contact position to close the circuit.
5. Take the required reading or observation.
6. Remove the plug to open the circuit when current is no longer required.
7. Repeat the operation as required by the experimental procedure.
8. Disconnect the power source after completing the practical.

Safety note: Use only within the confirmed voltage and current rating of the plug key. Treat the apparatus as a low-voltage educational circuit accessory unless STEMAids explicitly publishes a higher rating. Do not handle exposed terminals while the circuit is energized.

Care & Maintenance

• Keep plug and contact surfaces clean and dry.
• Insert and remove the plug without excessive force.
• Inspect terminals for looseness, corrosion or mechanical damage before practical sessions.
• Store the plug with the apparatus in a dry laboratory cabinet to prevent loss or contamination.

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 catalogue covers electricity and magnetism, mechanics, optics, heat, sound and related laboratory apparatus. 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 Single Circuit Plug Key used for?

It is used to manually open and close a single electrical circuit path during physics laboratory experiments. It provides simple control over when current flows through the setup.

How does a Single Circuit Plug Key work?

In a conventional design, inserting a conductive plug bridges separated electrical contacts and closes the circuit. Removing the plug opens the circuit and interrupts current flow.

Why is a plug key used during resistance experiments?

It allows current to flow only when a measurement is being taken. This can reduce unnecessary cell discharge and unwanted heating of circuit components between readings.

Can a Single Circuit Plug Key be used in an Ohm’s law experiment?

Yes. It can serve as the circuit-control key in a suitable Ohm’s law setup when connected according to the prescribed experimental circuit.

What are the plug and contacts made from?

The plug and contact materials of this exact STEMAids product have not been verified. These materials should be published only after checking the approved product specification.

Can the Single Circuit Plug Key be used with mains electricity?

Not unless the confirmed product rating explicitly permits it. The apparatus should be treated as a low-voltage physics laboratory accessory until verified otherwise.