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The Magnitude of the Magnetic Field of a Straight (Infinitely

Question 16

Multiple Choice

The magnitude of the magnetic field of a straight (infinitely long) current-bearing wire as a function of the distance r (from the wire) is proportional to


A) 1/r.
B) 1/r2.
C) 1/r3.
D) 1/r4.

Correct Answer:

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