Question

two parallel wires separated by a distance R have equal current I flowing in each.the magnetic field of one exerts a force F on the other.The distance R is incresed to 2R and the current in each wire is reduced from I to I/2 .what is the force between them now?

Answer 1

The magnitude of the force per unit length exerted by one wire on the other is [CPMT 1991; ... Two long and parallel wires are at a distance of 0.1 m and a current of 5 A is flowing in ...