Answer / arun

I think it is because of form factor.

Answer / nagarjuna

because of form factor always we go for sinusoidal in
practical and rms vaue required so the value is 1.11,and one
more reason as per the indian standards (BIU) .if we use
13kv and one may use 23kv , so that the equipment for
designing is very difficult so we go for standard notation
as per BIU

Answer / k.prakashchandra

Historical reason. Electric bulbs were first used in America
and they were of 100V DC. When AC was introduced, the same
bulbs were made to work on 110 V AC applying the form factor.

Answer / hemant kumar

the reason is that because at the generation station voltage
is generated at 11KV.so that it is a base label for
transmission purpose.at each stage it can amplified by step
up transformer as multiple of 11Kv like 33kv,66kv etc.

Answer / amit bamal

It is becoz of economic reason.

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