State Ohm's law. - Leaving Cert Physics - Question (h) - 2006

Ohm's law states that the current ( I) flowing through a conductor between two points is directly proportional to the voltage ( V) across the two points and inversely proportional to the resistance ( R) of the conductor. This can be mathematically expressed as:

$I = \frac{V}{R}$

or alternatively,

$V = I \cdot R$

This relationship holds true as long as the temperature and physical conditions of the conductor remain constant.