The wire in Figure 21.37 carries a current of 12 A. Suppose that a second long, straight
Question:
The wire in Figure 21.37 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 when the currents are
(a) In the same direction and
(b) In opposite directions.
Figure 21.37
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