Hello dear student !

If you are asking about the advantages and disadvantages of 220 V over 110 V , then it is answered below .

Advantage:

For the same load (power demand) , using 220V basically requires less current than using 110V. So 220V is more efficient than 110V.

Disadvantage:

As higher current can be more dangerous than higher voltage, however , since voltage and amperage are directly proportional. So, 110V wiring is usually considered more safer to work with because it uses fewer volts .

Hope this will help you !