Question

explain ohm law with their formula and graph and limitations

Answer 1

Ohm's law state that Potential difference in a conductor is directly proportional to the current applied in a conductor , provided that temperature remains constant.

V is directly proportional to I

= V = I R ( where R is constant of proportionality called as Resistance)

Answer 2

According to ohm's law,current flowing through a conductor is directly proportional to potential difference applied across the ends of conductor, provided physical conditions like temperature etc remain the same...

V=IR
WHERE, R is the proportionally constant called the resistance of the conductor.

If we plot graph of V versus I or(v-I) then we get straight line.
The slope of the line(v/I) gives the resistance of the conductor.
I-V graph of a conductor is also a straight line.