Content of the notes –

• Electric current and its types
• Mechanism of current flow in conductor
• Relation between electric current and drift velocity
• Current density
• Mobility
• Deduction of Ohm’s law
• Resistance
• Resistivity or specific resistance
• Temperature dependence of resistivity
• Temperature versus resistivity
• Failure of ohm’s law
• Carbon resistors
• Electric power and electric energy
• Combination of resistances
• Internal resistance of cell
• Combination of cells
• Kirchhoff’s law
• Wheatstone bridge
• Metre bridge (or slid wire bridge)
• Potentiometer
• Applications of potentiometre