**What is Ohm’s Law?**

**This Basic Law regarding flow of current is discovered by G.S. Ohm in 1828**.

Refer to the circuit diagram when a voltage ‘V’ is applied across one conductor. When a current ‘I’ is flowing through that conductor, the voltage is calculated as.

V∝I or V=IR

V is directly proportional to I, with the constant of proportionality being R, which is called the resistance of the conductor.

SI unit of Resistance is Ohm denoted by Symbol Ω” By using the above Equation, you can calculate voltage if current and resistance are given, and you can calculate current if voltage and resistance are given. Similarly, you can also calculate resistance.

R=V/I or I=V/R

This relation between Voltage “V” Current “I” and Resistance “R” is calculated using Ohms Law.

Here Resistance R is not only depended on material used in conductor but also depend on Dimension of conductor.