Two parallel wires carry currents in the same direction. I1=3A and I2=1A and the distance between the conductors is 4 cm. The magnetic field midway between these two wires is
Physics - drwls, Monday, April 25, 2011 at 6:50pm
Subtract the magnetic fields (since they are in opposite directions) due to the separate wires at a distance of 2 cm from each wire.