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Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv ?

Transformer Induced voltage equation contains 4.44 factor.

E=4.44*f*T*phi

E -Induced emf per phase

T -number of turns

f -frequency

phi -maximum flux per pole From the equation we see that E is proportional to 4.4 and it is in turn multiple of 11. So always transmission voltage is multiple of 11

E=4.44*f*T*phi

E -Induced emf per phase

T -number of turns

f -frequency

phi -maximum flux per pole From the equation we see that E is proportional to 4.4 and it is in turn multiple of 11. So always transmission voltage is multiple of 11