Physics · Moving Charges and Magnetism
A 2.0 cm straight segment of a thin wire, centered at the origin (0, 0, 0), lies along the y-axis and carries a current of 10 A in the positive y-direction. The magnetic field vector at the point (-20 cm, 0, 0) is: (where î, ĵ, and k̂ are standard unit vectors and μ0 = 4π × 10-7 T·m/A)
- 1-(1.0 μT) k̂✓
- 2(1.0 μT) k̂
- 3-(0.5 μT) k̂
- 4(0.5 μT) k̂
Correct answer
-(1.0 μT) k̂
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