A circular loop of wire of radius 10 cm carries a current of 6.0 A. What is the magnitude of the magnetic field at the center of the loop? (?0 = 4? × 10-7 T ? m/A)
A) 3.8 × 10-5 T
B) 3.8 × 10-7 T
C) 1.2 × 10-5 T
D) 1.2 × 10-7 T
E) 3.8 × 10-8 T
Answer: A
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