2 Two parallel long wires carry currents i and i with i i

Last updated: 6/20/2023

2 Two parallel long wires carry currents i and i with i i When the current are in the same direction the magnetic field at a point midway between the wires is 10 T If the direction of i is reversed the field becomes 30 T Then the ratio i i2 is 1 4 2 3 3 2 4 1