* 65. ssm A piece of copper wire has a resistance per unit length of 5.90 X 10-3 1/m. The wire is wound into a
* 65. ssm A piece of copper wire has a resistance per unit length of 5.90 X 10-3 1/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.140 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coil ** ** 66. The drawing shows two wires that P
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