Answer Happy

7. Two long, straight wires are hanging parallel to each other and are 1 cm apart. The current in Wire 1 is 5 A, and the current in Wire 2 is 10 A in the same direction. Which of the following best describes the magnetic force per unit length felt by the wires? (A) The force per unit length on Wire 1 is twice the force per unit length on Wire 2. (B) The force per unit length on Wire 2 is twice the force per unit length on Wire 1. (C) The force per unit length on Wire 1 is 0.0003 N/m, away from Wire 2. (D) The force per unit length on Wire 1 is 0.001 N/m, toward Wire 2. (E) The force per unit length on Wire 1 is 0.001 N/m, away from Wire 2.