Electromagnetic Foundations of Electrical Engineering
Chapter One
Basic Field Vectors
1.1 The Electric and Magnetic Field Vectors
A set of four vectors is needed to describe electromagnetic field phenomena. These are:
the electric field vector, E (units: V/m, volt per meter)
the magnetic induction vector, B (units: T, tesla)
the electric displacement vector, D (units: C/[m.sup.2], coulomb per square meter)
the magnetic field vector, H (units: A/m, ampere per meter)
Among these, the first two have special physical significance, since they can be determined
experimentally and measured.
If you place a static charged particle Q > 0 in a region where E is to be determined, you
will see that a force [F.sub.e] is exerted on the charge (Figure 1.1(a)) from which E is
obtained:
E = 1/Q [F.sub.e] (1.1)
Now consider that the same charged particle is moving with a prescribed velocity v in a
region where B exis ... read full excerpt from Electromagnetic Foundations of Electrical Engineering ebook