electrostatic situation

All materials are broadly classified into two categories, one conductors and other insulators. When a conductor is placed in a electric field, there is a large scale of physical movement of free electrons, within the conductor and they move out only if we make arrangements for it. Insulators are ca..

In a static situation, when a conductor is charged, the excess charges reside only on the surface. If we consider any arbitrary volume inside a conductor, the electrostatic field on closed surface bounding the arbitrary volume is zero. Thus, the flux through the surface is zero..

Gauss's theorem in electrostatics indicates that isolated charges exist and that electric lines of force do not form closed loops. The situation is different in magnetis..

Magnetism and Gauss's Law - Gauss's theorem in electrostatics indicates that isolated charges exist and that electric lines of force do not form closed loops. The situation is different in magnetism. The Gauss's law in magnetism therefore will ..

Thomson's Model - According to this model, an atom can be considered as a sphere of uniformly distributed positive charge in which there are electrons distributed symmetrically. The electrons must be held by the positive charges by electrostatic forces. The mutual repulsions between the e..

Origin of Resistivity - In electrostatic situations, the electric field is zero everywhere within the conductor, and there is no current. This does not mean that all charges within the conductor are at rest. In metals such as copper or aluminium, some of the electrons are free t..