(8c29p11) NEXLEOMENTIESOUCE srmed by bending a very long wire, as shown. If the wire caries a current of 5 A, what is the magnitude and direction of the magnetic field at the point a? Take R = 8 mm. Take the sign of B to be positive if the direction is out of the paper and negative if B is into the paper. You need to enter the number with its sign and a space and the unit. 0.0013116 T Check your units. The straight portions add to act like one infinite line. Add the contribution from semicircle. Submit Answer Incorrect. Tries 1/4 Previous Tries What is the magnitude and direction of the magnetic field at the midpoint b? The distance between a and b are much larger than R (each straight section is "infinite"). Take the sign of B to be positive if the direction is out of the paper and negative if B is into the paper. Submit Answer Tries 0/4 71 Send Feedback This discussion is closed