the electric power coming from the genaraiting station is reduced from 11kv to 220v.?

Question

Does the energy carried by the electrons remain as same as when potetial was 11kv or decreases. 10 Mwatt electricity is produced.

Answer 1

Voltage V measures energy per electron and current I measures the number of electrons that pass per second. Power it I*V. Each electron carries less energy if you use a transformer to lower V, but more or them pass per second, so there is minimal energy loss. That is, I*V stays the same.

Answer 2

Yes, almost. Actually some energy is lost due to transformation from 11 kV to 415 / 220 V( say 1~2 % ). And some transmission losses need to be considered when the energy is transmitted from the generating station to your house.

Answer 3

Except for the minor losses in the transformer, the energy stays the same. The voltage goes down by a factor of 50, but the current goes up by the same factor.