Dielectrics and Polarisation
Dielectrics
Dielectrics are non-conducting substances. In contrast to conductors, they have no or the negligible number of charge carriers. In a dielectric, free movement of...
Electrostatics of Conductors
Electrostatics of Conductors
Conductors contain mobile charge carriers. In metallic conductors, these charge carriers are electrons. In a metal, the outer (valence) electrons part away...
Potential Energy
Potential Energy in an External Field
The potential energy of a single charge:
The external electric field E and the corresponding external potential V may vary...
Equipotential Surfaces
Equipotential surfaces
Surface over which the electric potential is same everywhere is called an equipotential surface.
Equipotential surfaces...
Electrostatic Potential
We know that central forces are conservative in nature i.e., work done on any particle moving under the influence of conservative forces does not...
Applications of Gauss’s Law
Applications of Gauss’s Law
Field due to an infinitely long straight uniformly charged wire
Field due to uniformly...
Gauss’s Law
The surface integral of electrostatic field E produced by any source over any closed surface S enclosing a volume V in vacuum i.e. total electric flux over...
Electric Dipole
An electric dipole is a pair of equal and opposite charges q and –q separated by some distance 2a. Its dipole moment vector p...
Electric Flux
Consider a plane surface of area ΔS in a uniform electric field E in the space. Draw a positive normal to the surface and...
Electric Field Lines
For a single positive point charge q, electric field is
Since electric field varies as the inverse of the square of...