Physics
In a three pin plug, the longest pin is :
- live pin
- neutral pin
- earth pin
- can be any
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.
Related Questions
Draw a labelled diagram with the necessary switch, regulator, etc. to connect a bulb and a fan with the mains. In what arrangement are they connected to the mains: series or parallel?
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(b) How are the bulbs B and C connected with the mains? At what voltage does the bulb B glow?
(c) How is the glow of bulbs A and C affected if bulb B gets fused?
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