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Electromagnetic Field Theory by Yaduvir Singh

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5

Electrostatics

5.1 INTRODUCTION

Discoveries by Coulomb, Ohm, Faraday and Kirchhoff have greatly contributed towards electric circuit theory. Maxwell’s equation comprises laws of electricity and magnetism. Maxwell’s equation involves magnetic intensity density, electric field intensity, magnetic intensity, current density, charge density, etc.

There are two fundamental laws:

  1. Coulomb’s Law

  2. Gauss’s Law

Coulomb’s Law deals with electric field due to any charge configuration, whereas it is easier to use Gauss’s Law, when charge distribution is symmetrical.

5.2 COULOMB’S LAW AND FIELD INTENSITY

Force F exists between two point charges q1 and q2 as per Coulomb’s Law along the line joining them. This force is inversely proportional to the square of ...

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