Question

1. Define the law governing the relation between current and potential difference.also represent the law graphicaly​

Answer 1

The law governing the relation between current and potential difference is known as the ohm's law.

Ohm's Law states that,"If the physical conditions are kept constant for a conductor, the current flowing through it is directly proportional to the potential difference across it's two ends."

Mathematically, it may be expresses as:

Current (directly prop. to) Potential Difference

=> Potential diff. = Resistance×(Current)

=> V = R×I

The constant proportionality introduced is known as Resistance, denoted by R and has a unit 'ohm'.

Graphical Interpretation:

Since, Potential Difference is directly proportional to Current flowing, it's plotted graph gives a straight line.

That is V/I = constant = R.