Question

Why is the earthing pin of a plug always longer than the two pins?

Answer 1

1. Earthing is the process by which transferring the unnecessary current directly to the earth and giving the path to the leakage current.
2. The earthing pin of a plug always comes first to the body of the appliances so, whenever it is required to transfer or to take the current from the earth.
3. It differentiates from the other two pins and it increases our safety from getting a fatal shock at the time of high current and low current.