Answer Posted / zahid noor

It is only form factor which has a constant of K= 1.11, &
if I can recall the old formula which says Induced
EMF/Voltage in a Transformer was 4.44 phixBxNxA volts,&
hence the voltage ranges for transmission are in the
multiples of 1.11. Regarding other answers of Insulators,
there is no point regarding this & power is being
transmitted through cables also where you need not require
insulators.

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