0- SI unit of electric current is ampere.
- The property due to which the flow of electrons is resisted in a conductor is known as resistance.
- Ohm is the SI unit of resistance.
- Cell is the device used to maintain the potential difference across a conductor.
- SI unit of potential difference is Volt.
- Ohms law states that the magnitude of electric current flows through a conductor is directly proportional to applied potential difference across its end.
- Resistance of a conductor is directly proportional on its lenght and inversely proportional on its area of cross section.
- Equivalent resistance of several resistors in series is equal to the sum of their individual resistance.
- If current passes through a conductor then the heat generated in the conductor is given by H = VIt
