ABSTRACT
Ohm’s law states that the potential difference across any element is directly proportional to the current carried by it, if the physical conditions (temperature, dimensions, etc.) remain unchanged.
(1.1)
(1.2)
R is a constant of proportionality and is called the resistance of an element. R may be represented in terms of element length (l), area of the cross-section (A), and resistivity of the element (ρ).
