004 finalA.pdf 1 / 2 150% + NOTE: Use g=9.81m/s², µo = 4M * 10-7T.m/A, t = 3.14 and k = 9 * 10°NM²/C² in your calculations if needed. 1. Four long, straight and current carrying parallel wires are...

Extracted text: 004 finalA.pdf 1 / 2 150% + NOTE: Use g=9.81m/s², µo = 4M * 10-7T.m/A, t = 3.14 and k = 9 * 10°NM²/C² in your calculations if needed. 1. Four long, straight and current carrying parallel wires are arranged as shown in the figure. Assume that each wire except the wire II is III IV magnetically isolated from each other. (a) (15 pts) Obtain the vector form of the net magnetic field Bet acting on the wire II. (b) (15 pts) Calculate the current i4 that makes the magnetic field strength zero at a point P located on the midpoint of the wires II and III for the current values i, = 1A, i, = 2A,iz = 3A and d = 1m. i,4 i, -d→