Question

State ohm's law give its mathematical expression and define 1 ohm on the basis of expression .

Answer 1

Statement of Ohm's Law:

Ohm’s law states that at a constant temperature, current 'I' through a conductor between two points is directly proportional to the potential difference or voltage 'V', across the two points. That is,

                                                 

                                     

                                            

Thus, the ratio V : I is a constant. This constant is called as the resistance (R) of the conductor.

1 ohm is the resistance of the conductor carrying current I through pd V

Answer 2

Answer:

Explanation:

Ohm's Law States that the Current ( I ) through a Conductor is Directly Proportional to the Potential Difference across the conductor , at Given Temperature.

⇒ V ∝ I

⇒V/I = Constant .... ( Here the constant taken is R i.e, the Resistance)

⇒V/I = R

⇒V = IR

            This could be Derived from the Graph of VI graph of Resistance as:

Slope = (y₂ - y₁) / (x₂ - x₁) = Resistance

ΔV / ΔI = R

When there is a flow of 1 A of current in a conductor of Potential Difference of 1 Volt , then the Resistance of the Conductor is said to be 1 Ohm