OHM'S LAW

Ohm's law: 

The concept of ohm's law was proposed by Georg Simon Ohm and so it is named as Ohm's law.

It states that the current flowing through a conductor is directly proportional to the potential difference across the ends of the conductor and inversely proportional to the resistance.

                        I=V/R

         here,

                        I-current

                       V-potential difference

                       R-resistance

Ohm's law cannot be applied to

• Magnetically coupled circuits such as Transformers
• Vacuum tubes
• Gas filled tubes
• Semiconductor devices such as diodes
• Transistors
• Temperature dependent devices such as thermistors
• Photo sensitive devices
• Non linear elements

It is applicable for the linear elements only.