Answer Posted / vijendra joglekar

It is standarad frequency in india.

Electrical equipment made by the manufacture only for
certain frequency can not be used for other frequency.
In some cases it is made to be used for both frequencies
and in that case they specially mentioned on the type plate:
50/60 Hertz.
Example battery charger for laptop computer: on the type
plate itself is mentioned:100/240volts 50/60 hertz(which
means any voltage between 100 and 240 volt plus can be used
on either 50 or 60 Hertz.
Why you can not use other frequency:
because internal current goes up and might this up faster
deteriation of the insulation of wiring,which cause
shortciruit and this may lead fir,which can burn down your
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