Answer / dharmesh boudhanwala

in olden days, there was no morden tech. to remove fluctuating
voltage n hence current. so there was enough chance to to damage the our ele. appliences.hence earthing is provided.
but now a day days,tere will be a vert latest n improoved tech. were found out which will produced voltage n current in balanced.but not 100%.so there will be a less chance to damage.

Answer / k.prakashchandra

Metal body is not used.

Answer / prince

Because electronic circuits work on mA current which is pretty low to cause any hazard to human body.

Answer / pallab jyoti phukon

now a days most of the electrical appliances are electronically operated which consume very less power ,so i think we dont need the additional 3rd pin

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