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## Homework Statement

You have a 1.1-m-long copper wire.You want to make an N-turn current loop that generates a 1.66 mT magnetic field at the center when the current is 1.01 A. You must use the entire wire. What will be the diameter of your coil?

## Homework Equations

## The Attempt at a Solution

I figured that this is a solenoid so I tried starting off by finding the number of turns it would take by using this equation...

LB/UI = N

The U is Mue 1.257x10^-6

I got 1438.28

but now I don't know what to do?