Answer :
The earth wire is a safety device that is attached to the appliance's casing. If the live wire falls loose and hits the casing, the earth wire offers a conduit for the electrical current to pass. The high current flowing through the ground line melts the fuse, turning off the device. If there is no earth wire, we will be the least resistance path for the current to ground in the event of a fault (shock), as there is no other way for the fault current to dissipate. In the event that there is an earth wire. Because the earth line is the least resistance path to the ground, we will be unaffected.
Explanation :
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