Question

state Ohms Law. What is the relation between I, V and R? draw the graph
between V and I .​

Answer 1

Answer

Ohm's law : The current flowing through a conductor is directly proportional to the potential difference applied across its ends , provided the temperature is constant.

The relation between I , V and R is :

• V = IR

It is derived as :

From Ohm's law :

$\sf potential \: difference \: \infty \: curent \\ \\ \sf \implies \: V \infty I \\ \\ \implies\sf V = IR$

The graph between V and I is attached above . It shows a staight line that refers potential difference is directly proportional to current.

Answer 2

Ohm's law states that the current flows through the conductor is directly proportional to the potential difference of battery

$\sf \mapsto V \prop I \\ \\ \sf \mapsto V = IR$

Where , R is the constant of proportionality which is called resistance of the conductor

$\sf \underline{Limitations \: of \: ohm's \: law}$

• It is not applicable for semiconductor

• It is not applicable when the temperature and surrounding conditions are not constant