One Way Plug Key
Product Code : SCL-EAE-11287
Quick answer: The One Way Plug Key is a manual circuit switch with one make-and-break contact and two connection terminals. Inserting the plug closes the circuit and removing it breaks the current, which is how students switch Ohm's law, meter and lamp circuits on only while taking readings. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Device type | Manual one-way laboratory circuit switch |
| Controlled circuit paths | One |
| Operating method | Manual plug or contact operation |
| Terminals | Two electrical connection terminals |
| Primary function | Making and breaking an electrical circuit |
How the one way plug key is used
The one way key is the simple on-off switch of the physics laboratory. When the plug bridges the two conducting blocks the circuit is closed and current flows; when the plug is removed there is a visible gap and the circuit is open. Students can see the state of the circuit at a glance, which an enclosed switch does not show.
In an Ohm's law or meter practical the key is kept open while the circuit is checked and between readings, and closed only for each observation. This stops the resistors and wires warming up, since resistance changes with temperature and would spoil the readings.
- Keep the supply disconnected while the circuit is assembled.
- Connect the two key terminals in series with the cell, meters and load.
- Leave the plug out while all connections are checked.
- Insert the plug to take a reading, then remove it before changing the circuit.
Key features
- Single make-and-break contact controls one circuit path
- Open and closed states are visible at a glance
- Two terminals for series connection with cells, meters and resistors
- Current can be interrupted between observations without rebuilding the circuit
- Mounted format sits steadily on the laboratory bench
- Suited to teacher demonstrations and supervised student work
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the one way plug key at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Electrical and Electronics products
- Reversing Key / Commutator (SCL-EAE-11286)
- Two Way Plug Key (SCL-EAE-11288)
- Four Way Plug Key (SCL-EAE-11285)
- Rheostat 6 Inches (SCL-EAE-11284)
- Tapping Key (SCL-EAE-11283)
- Rheostat 8 Inches (SCL-EAE-11282)
The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What is a one way plug key in physics?
It is a simple switch in which a removable conducting plug joins two terminals. With the plug in, the circuit is closed; with it out, the circuit is open. It appears as a key symbol in circuit diagrams.
Why is the key opened between readings?
Opening the key stops the current so the resistance wire does not heat up. Heating changes resistance and would affect later readings in experiments such as Ohm's law.
What is the price of the one way plug key?
Prices are not published on the website. Add the one way plug key to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11287 and the quantity, to receive a quotation.
Does Lab Exports manufacture the one way plug key?
Yes. Lab Exports manufactures the one way plug key at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11287.
Request a quote
Email [email protected] with the house code SCL-EAE-11287 and the quantity, or add the one way plug key to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
