A 75-M Long Extension Cord Carries a Current of 12 Amps

Multiple Choice

A 7.5-m long extension cord carries a current of 12 amps.The cord is made of two wires,carrying currents in opposite directions,separated by a distance of 4.9 mm.Find the force between those two wires.

A) 0.0059 N
B) 0.044 N
C) 0.33 N
D) 1.2 N
E) 9.0 N