Answer / abhi

it is due to form factor....but

form factor = rms value / average value

for a sinusoidal supply of voltage in terms of sine wave

ff = a/root 2 (rms) / 2a/pie (avg)
= 1.11

and hence 11*1 = 11 kv
11*2 = 22 kv
11*12=132 kv and so on....

Answer / sandeep mathur

because of form factor factor
form factor= average value of emf/rms value of emf

which is equal to 1.11

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