Why do plugs have 2 pins and 3 pins?

1.	Why do plugs have 2 pins and 3 pins?
Answer» The PLUGS having 2 pins are devices which can EASILY handle high voltages.The plugs having 3 pins have 3 wires, a NEGATIVE, a positive and an EARTHING wire because these cannot handle high voltages.

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Why do plugs have 2 pins and 3 pins?

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