Recent content by toochieboy

So just change the sign - to sign + in [i2/pi(0.72m) - 28A/.72m)] how about in letter B?

Homework Statement The wire in Figure 21-40 carries a current of 12 A. Suppose that a second long, straight wire is placed right next to this wire. The current in the second wire is 28 A. Use Ampère’s law to find the magnitude of the magnetic field at a distance of r = 0.72 m from the wires...