0.060 m A I B I 0.030 m 0.120 m

Two very long wires are parallel to each other separated by a distance d.  The same current flows through each wire but in opposite directions.  See the arrows in the diagram.  Let I = 1 Amp and d = 0.1 meter. a)  What is the direction of the net magnetic field due to the two, long wires in the space between the wires? Explain your answer. b)  Calculate the magnitude of the net field at point P, which is half-way between the wires. c)  Calculate the magnitude of the magnetic force per unit length due to wire #1 on #2. d)  Determine the direction of the force calculated in part (c) and explain your answer.

The two wires shown in the figure below are separated by d = 10.7 cm and carry currents of I = 4.85 A in opposite directions. 1) Find the magnitude and direction of the net magnetic field at a point midway between the wires. 2) Find the magnitude and direction of the net magnetic field at point P1, 10.7 cm to the right of the wire on the right. 3) Find the magnitude and direction of the net magnetic field at point P2, 2d = 21.4 cm to the left of the wire on the left.

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 uT)? Point P is at the center of the semi-circular section. 2A (A) 5.00 (B) 7.53 (C) 9.81 •P 个 (D) 12.3 (E) 2.31 (F) 15.0 20cm 14A