Answer / ujjal

its for the form factor that is the ratio between rms value
and avarage value. it becomes constant as 1.11. so we can
generate ac voltage that is multiply of 1.11

Answer / nitin goyal

mr.sunil for your information insulators are designed
according to lines,not the lines are designed for the
insulator disc, so please be sure before answering

Answer / swapnil

coz of form factor which is 1.11 and emf eqn of t/f is also
multiple of form factor whichmakes easy for t/f to transmit
at these voltages

Answer / shahid

transmission always done at high voltage becuase
1) To reduce losses, losses is(I2R) we step up
voltage simultaniously reduce current through
transformer as current is very less losses will
also be very less as losses is(I2R)
2) If we transmit at high current conducter size
will get increase because to increase current
resistance must be reduce. To reduce resistance
we have two way i.e either length of transmission
should decrease or area should increase because
resistance(r=$l/a)l=length,a=area
if we transmitt at high current size of conductor
will be very thick because length cant be reduce.

Answer / nitin goyal

Its not form factor, if it was so then why there are 400KV
or 765 KV lines.
Answer to it is just a coincidence, It all started in 1881
when first hydroelectricity generator was set up in niagara
falls. That generator produced 110V and then onwards it all
started with that
So it is a mere coincidence that there are 11,33,66,132 KV lines

Answer / ruddho

i have also this question. Its a request for everyone if u
know the answer correctly then plz answer otherwise not.

Answer / krupa s

to avoid thired harmonics

Answer / sunil kumar singh

each insulator disc of rating is multiple of 11 so we use 11,33,66kv

Answer / deben.

Answer this your self !

Answer / k.prakashchandra

The early AC incandescent bulb was of 110 V

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