Explain the advantage and disadvantages of AC over DC.

Explanation

Advantages of AC:-
(i) AC can be stepped up or stepped down by using a transformer.
(ii) AC can be easily converted into DC, using electronic power supply units.
(iii) AC devices are more durable since power dissipation is less.
(iv) Transmission of electrical power is more efficient and economical in the form of AC.
(v) Current in an AC circuit can be reduced using reactive elements like choke coils and capacitors which consume very little power.
Disadvantages of AC:-
(i) It cannot be used for electroplating.
(ii) The average value of alternative current over a half cycle is less than its rms value.
Hence for a given value of current, wires carrying AC require better insulation.
(iii) AC meters have a non-linear scale. As a result, accuracy of measurement is not uniform throughout the range.