A wire carries a 20.00-A current has been curved as shown in Figure . What is the magnetic field at point O? Where R= 10cm, α=2π/3.
B = µ° × I × θ / (4 × π × R)
µ° = 4 × π × 10-7 T × m / A
I = 20.00A
θ = 2π/3
R = .1m
B = 4.189 × 10-5 T
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