In a solid, atoms vibrate about their equilibrium position at ordinary temperature and the amplitude of vibration decreases to a minimum at absolute zero of
Let us discuss the heat developed in a current carrying conductor and derive a relation for the same. According to Joule’s law, the heat developed
CLASSIFICATION OF MATERIALS ON THE BASIS OF CONDUCTIVITY On the basis of conductivity ,the materials can be classified in to following categories:- (a) Conductors:- These
STATIC DIELECTRIC CONSTANTS OF SOLIDS As discussed in the previous articles,the dielectric polarization can be considered to arise from three major sources: Electronic ,ionic and
Electron Scattering and Matthiessen’s Rule Matthiessen’s Rule: The resistivity ρ of a metal containing small amount of impurities may be written as: ρ = ρ0i+
As the resistivity of a material is given as ρ=m/ne2t This shows that the resistivity is related to the number density n of free electrons
As the resistance of a metallic conductor is given by R=ml/ne2 tA Where m is mass of electron, n is number of electrons, e is
As we have already derived and discussed the Ohm’s law. Let us derive and discuss the point form of Ohm’s law which is basically the
Current density at a point in a conductor is defined as the amount of current flowing per unit area of the conductor around that point
RESISTANCE AND RESISTIVITY The resistance of a conductor is the obstruction offered by the conductor to the flow of electric current through it. Resistance (R)
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