College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 64

The two wires shown in Figure P19.48 are separated by d = 10.0 cm and carry currents of I = 5.00 A in opposite directions. Find the magnitude and direction of the net magnetic field (a) at a point midway between the wires; (b) at point P 1 , 10.0 cm to the right of the wire on the right; and (c) at point P 2 , 2 d = 20.0 cm to the left of the wire on the left.