Question

State one advantage of using a.c over d.c.

Answer 1

Alternating current or otherwise called as a.c in short is very much useful than direct current which is abbreviated as d.c. One of those advantages is in passing the current in to longer distances which is not possible with the use of direct current.

Complete step-by-step answer:
As high voltages are extremely efficient in sending electricity into great distances, AC electricity has greater advantage over DC. The high voltages from the power station can be easily reduced to a safer voltage for use in the house when we use alternating current. This is the reason for it. Varying voltages is done with the use of a transformer. Nowadays we can see so many transformers near our area. So this is the main advantage of a.c over d.c.

Note: There are so many other advantages too. Alternating current is very easy and much cheaper to be generated than direct current. As cited above it can be transferred to long distances as compared to dc. Another important advantage is that power loss in alternating current is very much less compared to direct current during its transmission across this much distance. Alternating current is very easily converted into direct current. The reverse is not that much possible. AC is stepped up and down from one level to another level in a very easy manner. For this purpose, transformers are available which are also cheaper, reliable and robust in design and its construction. DC is not being able to step up or step down very easily and economically also. Direct current is used in inverters and batteries.