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j88k
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Homework Statement
You have a 1.10-m-long copper wire. You want to make an N-turn current loop that generates a 0.800 mT magnetic field at the center when the current is 1.50 A. You must use the entire wire.
What will be the diameter of your coil?
Homework Equations
B = (mu_0)(n)(i)/(2r)
2(pi)(r)(n) = 1.1 ?
The Attempt at a Solution
0.8 * 10^-3 = 4(pi)*(10^-7)n(1.5)/2r
find n/r from this then:
nr = 1.1/2(pi)
combine the two you get r^2 = ...
I'm not sure if I am going right here although I'm quite positive.. Need help on the calculations.