CHAPTER 8

Electromagnetic Waves

CHAPTER AT A GLANCE

Displacement Current

While applying the Ampere’s circuital law to find magnetic field at a point outside a capacitor which connected to a time varying current, Maxwell noticed an inconsistency in Ampere’s law. He suggested the existence of an additional current and called it displacement current.

ch08_img86.png

“Displacement current is a current which is produced due to rate of change of electric flux with respect to time”.

It is given by

 ch08_eqn87

According to Ampere’s circuital law, we have

where, current threading ...

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