12th ISC Physics: Current electricity

Topics covered in this notes are

•Electric current

•Current density

•Relaxation time and mean free path

•Drift velocity

•Mobility of electrons

•Relation between drift velocity and electric current (derivation)

•Electric Resistance and Conductance

•Ohms law: Exceptions, derivation and it's vector form

•Effects of temperature on resistivity

•Temperature coefficient of resistance

•Combination of resistances

•Electric Power

•And numericals based on theory needed for exams