Answer Posted / jamshid al rahman

As per my view,
Our Ancestors used and followed so most of the equipment's are designed for 50Hz if we change it we may need to change most of the equipment's currently using.
There are many advantages for different frequencies also disadvantages too.
as replay for one of the above comment, for transmitting it is better to use DC which has no frequency. So lower the losses and utilizes the entire conductor unlike AC flow on surface and inner area is useless (skin effect).

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