Question

What is meant by 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

• Frequency of Alternating current is equal to the number of cycles completed in one second. 
•  In India, frequency of AC is 50 Hz i.e. 50 cycles per second. 
• An alternating current is considered to be advantageous over direct current for long range transmission of electric energy because it can be transmitted over long distances to distant places without much loss of electric power as compared to direct current.