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Focus on Concepts, Incorrect. Right-Hand Rule No. 2 (Section 21.7) indicates that the magnetic fields from both wires in 3 point into the screen, away from the reader. Thus, the net magnetic field cannot be zero. The drawing shows four situations in which two very long wires are carrying the same current, although the direction of the currents may be different. The point P in the drawings is equidistant from each wire. Which one (or more) of these situations gives rise to a zero net magnetic field at P? 2 and 4 3 and 4 Only 1 2 and 3 Only 2

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