Write down a relation for the force per unit length between two parallel conductors carrying current.

What is the nature of force between two parallel conductors carrying current in the same direction?

Write down the equation for displacement current

A current carrying conductor placed in a magnetic field experiencesa force. Calculate the force per unit length on along straight wire carrying a current of 4A due to parallel wire carrying 6A current. Distance between the wires is 3 cm.

Calculate the force per unit length on a long straight wire carrying a current of 4A due to par allel wire carrying 6A current. Distance between the wires is 3 cm.

Write down the relation between the emf of cell and its internal resistance.