Two wires separated by a distance of 22 cm carry currents in the same direction. The current in one wire is I1 = 1.5 A , and the current in the other wire is I2 = 4.5 A
The current is adjusted until the magnetic field halfway between the wires has a magnitude of 2.7×10−6 T and points into the page. Everything else in the system remains the same.

Find magnitude of I1

Question

Two wires separated by a distance of 22 cm carry currents in the same direction. The current in one wire is  I1 = 1.5 A , and the current in the other wire is I2 = 4.5 A
The current  is adjusted until the magnetic field halfway between the wires has a magnitude of 2.7×10−6 T and points into the page. Everything else in the system remains the same.

Find magnitude of I1

anonymous · Answer

u.I1/2.pi.r -u.I2/2.pi.r

u = permeability

r = 22/2