Description
Electric current. Drift velocity, mobility, and their relation with electric current. Ohm’s law.
Electrical resistance. V-l characteristics of Ohmic and non-ohmic conductors. Electrical energy
and power. Electrical resistivity and conductivity. Series and parallel combinations of resistors;
Temperature dependence of resistance.
Internal resistance, potential difference, and emf of a cell, a combination of cells in series and
parallel. Kirchhoff’s laws and their applications. Wheatstone bridge. Metre Bridge.
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