Mechanism of flow of current in conductors. Mobility, drift velocity and its relation with electric current; Ohm’s law and its proof, resistance and resistivity and their relation to drift velocity of electrons; V-I characteristics
(linear and non-linear), electrical energy and power, electrical resistivity and conductivity. Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors; temperature dependence of resistance
and resistivity.
Internal resistance of a cell, potential difference and emf of a cell, combination of cells in series and in parallel, Kirchhoff’s laws and simple applications, Wheatstone bridge, metre bridge. Potentiometer – principle and its applications to measure potential difference, to compare emf of two cells; to measure internal resistance of a cell.
Current Electricity [Videos]
- Drift Velocity & Current
- Ohm's Law, Resistivity & Conductivity
- Wheat Stone Bridge
- Combination of Cells
- Combination of Resistances
- Combination of Resistances [part 2]
- Combination of Resistances[Use of Wheat Stone Bridge]
- Combination of Resistances[Junction Removal Method]
- Combination of Resistances[Symmetry Rule]
- Potentiometre [Part 1]
- Potentiometre [Part 2]
