As we all know that in general the phenomenon of Electromagnetism is governed by the four classical equations called Maxwell's equations. Maxwell's equations represent the phenomena of Electromagnetism as a whole. However, as we progress in this course whenever it is not necessary to go to the regression analysis of the Maxwell equations and under certain approximations we can investigate the same phenomena in terms of voltages and currents in terms of electric circuits, however We will see the representation of this in terms of tensions and currents become difficult. Then we can move on to the general phenomena of electric and magnetic fields.