Physics · Magnetic Effects of Current
A long straight conductor features a semicircular arc of radius π10 m and carries a current I = 3 A. The magnitude of the magnetic field at the center O of the arc is: (Take permeability of vacuum μ0 = 4π × 10–7 N A–2)
- 13 μT✓
- 24 μT
- 31 μT
- 46 μT
Correct answer
3 μT
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