Three Long,straight,parallel Wires Each Carry a Current of 10 a in the Positive

Question 83
Multiple Choice

Three long,straight,parallel wires each carry a current of 10 A in the positive x direction.If the distance between each wire and the other two is 10 cm,what is the magnitude of the magnetic force on a 20-cm length of either of the wires? A)57 N B)40 N C)69 N D)50 N E)20 N