Physics
In a three pin plug, the longest pin is :
- live pin
- neutral pin
- earth pin
- can be any
Household Circuits
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Answer
earth pin
Reason — The earth pin is used for grounding purposes, providing a path for fault currents to safely dissipate into the ground. It is usually longer than the live and neutral pins to ensure it makes contact first when the plug is inserted into an outlet, thereby providing an additional safety measure.
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