Question

mention two advantages of alternating current over direct current?

Answer 1

Both AC and DC have power loss in long lines because of the resistance in the wires. For a fixed power, higher voltage results in lower current through the power line, and lower current means lower power line losses. The early engineers realized that very high voltage is needed for efficient power transmission.......

Answer 2

AC voltages can be readily transformed to higher or lower voltage levels while DC current can't be.