II sem : 4 Experimental verification of Ohm’s Law.

Aim : Experimental verification of Ohm’s Law.

Apperatus : Metal wire,ohm's law kit

Formula: Ohm's law, 

         I = V/R, V= IR and R= V/I

Digram : 

Theory and Procedure: 

Resistance. The electrical resistance of a circuit  device is defined as the ratio of the voltage applied to the electric current which flows through it: If the resistance is constant over a considerable range of voltage, then Ohm's law, 

                                       I = V/R, 

can be used to predict the behavior of the material.

Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area a, and divided by its length l; ρ = Ra/l.

Ohm's law in terms of Resistance R= V/I

Result: I = V/R, V= IR and R= V/I , Voltage across junction is equal to the product of current flowing through the  circuit and Resistance i.e ohm's  law is verified.