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## Homework Statement

Two parallel wires have currents that have the same direction, but differing magnitude. The current in wire A is I, and the current in wire B is 2I. Which one of the following statements concerning the situation is true?

A) Both wires attract each other with the same force

B) Wire A attracts wire B with twice the force that wire B attracts wire A.

C) Wire A attracts wire B with half the force that wire B attracts wire A.

D) Wire A repels wire B with half the force that wire B attracts wire A.

E) Wire A repels wire B with twice the force that wire B attracts wire A.

## Homework Equations

F = L I X B

## The Attempt at a Solution

Okay, so I know that wires in the same direction will attract, so that removes options D and E. What I am unsure of though, is why the correct answer is A. While I was working this problem out, I assumed the force would be half that of wire B, due to the formula posted above. Why would the force be the same?

Any and all guidance is appreciated, thank you!