Ohm’s **law** was named after the German physicist** Georg Simon Ohm**, whose treatise published in 1827. Ohm’s Law is Law states that “Electric current is proportional to voltage and inversely proportional to Resistance”. The basic components of electricity are voltage, current, and resistance. Circuit diagram of ohm’s Law given below:

Contents

## Ohm’s Law Formula

**Fig: ohm’s law triangle**

Each equation shows the relationship between voltage(V), current(I), and resistance(R).

## L**imitations of Ohm’s law**

This **law** cannot be applied to unilateral networks. A unilateral network has unilateral elements like a diode, transistors, etc…, which do not have the same voltage-current relation for both directions of current**.** It is also not relevant for non – linear elements.

**V-I Characteristics graphs**

**Applications of Ohm’s Law**

**DC power supply****Alternator Generator****Electric Iron and Heater**

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