A copper wire carries a steady current of 125 A to a motor….
A copper wire carries a steady current of 125 A to a motor. Find the magnitude of magnetic field caused by a 1.0-mm segment of this wire at a point 1.2 m away from it, if the position vector of the point forms a 30 degree angle with the current direction. (μ0 = 4π × 10-7 T ∙ m/A. Integration is unnecessary becasue the length is short)