Electromagnetic Fields and Waves, 3rd Edition by Pearson

CHAPTER 6

TIME-VARYING FIELDS AND MAXWELL’S EQUATIONS

6.1 INTRODUCTION

As we have seen in the previous chapters, it was thought that electric fields can only be produced by the presence of charges. However, in 1831, Michael Faraday performed numerous experiments and found that there was a flow of current when he moved a magnet inside a coil. From his experiments, it was proved that electric fields can be produced not only by charges, but also by changing magnetic fields.

A static electric field intensity can exist without a magnetic field . This ...