The magnetic field at a point P, a certain distance from a long wire carrying a current of 2.0 A, is 1.2 × 10-6 T. How far is P from the center of the wire?
A) 11 cm
B) 22 cm
C) 33 cm
D) 44 cm
E) 55 cm
Correct Answer:
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Q80: FIGURE 22-8 Q81: The magnetic field at a distance of Q82: The magnetic field at a distance of Q84: Four long parallel wires each carry 2.0 Q85: How much current must pass through a Q86: Two long parallel wires carry currents of Q87: Two long parallel wires carry currents of Q88: FIGURE 22-9 
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