Suppose you have two straight cylindrical conducting wires parallel to each other. The same amount of current runs in the two wires but with opposite directions. You can think of the two wires as a rectangular coil with two infinite sides. The radius of the cylindrical wires is r = 0.3 cm and they are separate by a distance d = 1m in air. Calculate the coefficient of self inductance of the coil per unit length.

Suppose you have two straight cylindrical conducting wires parallel to each other. The same amount of current runs in the two wires but with opposite directions. You can think of the two wires as a rectangular coil with two infinite sides. The radius of the cylindrical wires is r = 0.3 cm and they are separate by a distance d = 1m in air. Calculate the coefficient of self inductance of the coil per unit length.