أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
There is not any big scientific or electrical reason as to why in US and some other parts of the World use 60Hz and in India and certain other parts of the World use 50 Hz.It is just the way it has been started and it continues so.Changing this system would cost a lot.
