Question

how to the need for displacement current?​

Answer 1

$\huge\bold\red{Answer:-}$

$<font color=purple>$You do not need the displacement current, just as you don't need low power factor. It is just there when you connect a reactive load. Current follows voltage in reactive load, and the other way in capacitive current. You then have to compensate it by power factor correction measure.

$\bold\red{THANKS}$