38. (II) A long pair of wires conducts 25.0 A of dc
Chapter 20, Problem 38(choose chapter or problem)
38. (II) A long pair of wires conducts 25.0 A of dc current to, and from, an instrument. If the insulated wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field 10.00 cm from their midpoint, in their plane (Fig. 20-56)? Compare to the magnetic field of the Earth.
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