Key one way

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Overview
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Key (One Way Key)

A One Way Key is a simple electrical switch used in physics experiments to make or break a circuit. It allows current to flow only when the key is inserted, and is commonly used in Ohm’s Law, resistance, and circuit verification experiments.

🧪 Key Features:

Type: One-way switch (single circuit control)
Material: Brass contacts mounted on a wooden or bakelite base
Design: Single metal plug inserted between two terminals to complete the circuit
Terminals: Brass screws with binding posts for connecting wires
Size: Compact and easy to mount on lab benches

📚 Applications:

Used to open or close an electrical circuit in physics practicals
Common in CBSE/ICSE/State board labs, B.Sc., and engineering courses
Essential for Ohm’s Law, rheostat, ammeter-voltmeter, and battery eliminator setups
Helps in safe control of experimental current flow