Answer: Four, long, parallel power lines each carry 100-A
Chapter 28, Problem 28.25(choose chapter or problem)
Four, long, parallel power lines each carry 100-A currents. A cross-sectional diagram of these lines is a square, 20.0 cm on each side. For each of the three cases shown in Fig. E28.25, calculate the magnetic field at the center of the square.
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