Question

what is the meaning of the term frequency of an alternating current? what is its value in India? why is an alternating current considered to be advantageous over direct current for long range transmission of electric energy

Answer 1

alternating current mean which fluctuate continuously from higher to lower and lower to higher potential. it's frequency means time required to fluctuate from higher potential to again higher potential. in India it is 50 Hz that means it fluctuate 50 times in a second.