1 Four Wires Four long #10 copper wires set up are parallel to each other. (#10 wire has a diameter of 2.588 mm and can carry currents of more than 50 A.) Their cross sections form a square that is d = 10 cm on a side. A current of I = 20 A is sent though each wire in the direction shown in the figure. (a) What is the magnitude and direction of the magnetic field B at point P, the center of the square? (b) What is the total force on a 2m segment of the lower left wire? Give both the magnitude and the direction.

1 Four Wires Four long #10 copper wires set up are parallel to each other. (#10 wire has a diameter of 2.588 mm and can carry currents of more than 50 A.) Their cross sections form a square that is d = 10 cm on a side. A current of I = 20 A is sent though each wire in the direction shown in the figure. (a) What is the magnitude and direction of the magnetic field B at point P, the center of the square? (b) What is the total force on a 2m segment of the lower left wire? Give both the magnitude and the direction.