why create a profile on Shaalaa.com? 1. Inform you about time table of exam. 2. Inform you about new question papers. 3. New video tutorials information.
An important advantage of AC over DC is that electric power can be transmitted over long distances without much loss of energy.
Most advantageous fact is that AC can be stepped up and down from one level to other easily. Transformers available for this purpose are cheap, reliable and robust in design and construction. DC can't be stepped up/down easily and economically.