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October 30, 2014

October 30, 2014

Posted by **Justin** on Thursday, February 10, 2011 at 6:42pm.

I want to use the formula F=IlBsin(theta); but am confused as to what F would be, what does just "float" horizontally imply?

- Physics -
**Christine**, Tuesday, April 12, 2011 at 7:48pmI won't be able to answer exactly, but we know that the net force on the wire would be zero. So it means that Force(gravity) = Force(magnetic)

- Physics -
**Christine**, Tuesday, April 12, 2011 at 9:37pmHey, I thought about it a little more and I have your answer here.

B = mu(naught) * I / (2pi * r)

You can solve for I in that equation. I hope it looks familiar.

mu(naught) = vacuum permeability

I = current

r = radius of wire

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