Question

Explain the need for displacement current

Answer 1

Here is your answer.

In electromagnetism, displacement current is the quantity appearing in Maxwel's Equation that is defined in term of the rate of change of elctric displacement field. Displacement current has the same unit as electric current. and it is the source of a magnetic field just as actual current is.

Answer 2

In electromagnetism, displacement current is a quantity appearing in Maxwell's equations that is defined in terms of the rate of change of electricdisplacement field. Displacement current has the units of electric current density, and it has an associatedmagnetic field just as actual currents do.