Answer to Question #55908 in Electricity and Magnetism for Misha Jain

Question

Each of two long parallel wires carries a constant current i along the same direction. The wires are separated by a distance 2l. The magnitude of resultant magnetic induction in the symmetric plane of this system located between the wires at a distance R from each wire will be? Find the relation between l and R if the magnetic induction in the symmetric plane of the system located between the wires is maximum.