3. In the diagram below there are two long, parallel, current carrying wires. The upper wire also has a semi-circular section of radius 15.0 cm. The distance between the wires is 20.0 cm. The upper wire carries a current of 2.00 A to the right and the lower wire carries a current of 14.0 A to the right. What is the magnitude of the net or total magnetic field at point P due to both wires (in µT)? Point P is at the center of the semi-circular section. 2A (A) 5.00 (B) 7.53 (C) 9.81 •P 个 20cm (D) 12.3 (E) 2.31 (F) 15.0 14A

Q8.2

The figure below shows two wires carrying currents of I = 5.30 A in opposite directions, separated by a distance d. Assume d = 9.6 cm. a).Find the magnitude (in µT) and direction of the net magnetic field at a point halfway between the wires. b).Find the magnitude (in µT) and direction of the net magnetic field at point P1, 9.6 cm to the right of the wire on the right. c).Find the magnitude (in µT) and direction of the net magnetic field at point P2, 2d = 19.2 cm to the left of the wire on the left.   d). What If? Repeat part (a) for the case where both wires carry currents in the same direction, upward in the figure. Find the magnitude (in µT) and direction of the net magnetic field at a point halfway between the wires.

In the figure, point P2 is at perpendicular distance R = 25.4 cm from one end of straight wire of length L = 12.5 cm carrying current i = 0.584 A. (Note that the wire is not long.) What is the magnitude of the magnetic field at P2? %3D %3D PR Pe R L. Number i Units