Topics Covered (with diagram and derivation)

1. Electric Currrent.
2. Ohm’s Law.
3. Explanation of current flowing through a Conductor.
4. Expression for current through a conductor.
5. Relaxation Time and Drift Velocity.
6. Relation connecting Drift Velocity, Electric field and Relaxation Time.
7. Mobility of Free Electrons.
8. Current Density.
9. Derivation of Ohm’s Law.
10. Dependence of Resistance on Temperature.
11. Superconductor.
12. Standard Resistance.
13. Combination Of Resistances.
14. EMF, Internal Resistance and Terminal Voltage of a Cell.
15. Combination of Cells.
16. Kirchhoff’s Rule.
17. Wheatstone Bridge.
18. Meter Bridge/Slidewire Bridge.
19. Potentiometer.
20. Colour Code Resistors.
21. Resistivity vs Temperature Graph.
22. Electrical Energy and Power.