- #1

Angie K.

- 108

- 1

## Homework Statement

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A long horizontal wire carries a current of

*I*1 = 48.1 A. A second wire, made of 2.5-mm-diameter copper wire and parallel to the first but a distance

*d*= 14.9 cm below it, is held in suspension magnetically. What is the current

*I*2 in the second wire? (Enter a positive value if

*I*2 is to the right, negative if it's to the left.)

## Homework Equations

B=mu0/2pi*(I)/r

## The Attempt at a Solution

I am not sure how to calculate I (current) without knowing the B (magnetic field) .

Can I use the equation from above to figure out the magnetic fields with plugging in different r values? If so, then would I just set them equal to find the other current?