Mention the advantage of alternating current over direct current.

Hint: Alternating current (AC) is a type of electric current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycle means AC that periodically reverses its direction, in contrast to direct current (DC) which only flow consistently in one direction which cannot change spontaneously.

Complete answer:
There are following advantages of alternating current over direct current

1. Long distance transmission can be done at high voltages, thereby reducing the current, and consequently losses in transmission.
2. Generation of alternating current is easier, and so is transmission.
3. Generation and transmission can be at high voltages, so the fact that it can be stepped up and down from level to other easily and efficiently. (we conveniently shift voltage by transformers ,in D.C. transformers are not used)
4. Cable sizes for AC are quite lighter in the comparison of D.C.
5. Power loss in AC is less as compared to DC during transmission.
6. AC can be easily converted into DC.
7. Voltage at which power can be sent can be higher in AC. These levels can be dangerous in DC.

Note:
Alternating Current (AC) is an electrical current which flows in power lines and normal household electricity that comes from a wall outlet is alternating current. Direct Current is the current that flows in flashlights or other appliances running on batteries.