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Old Nov7-09, 02:27 PM       Last edited by hawkbyte; Nov7-09 at 02:55 PM..            #1
hawkbyte

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Current - two parallel conductors

1. The problem statement, all variables and given/known data
Two long parallel wires are separated by 4.0mm. The current in one of the wires is twice the other current. If the magnitude if the force on a 2.0m length of one of the wires is equal to 7.0μN, what is the greater of the two currents?


2. Relevant equations
F(b)=μ*I(1)*I(2)*l/2∏a


3. The attempt at a solution
I'm afraid I oversimplified my approach to this problem. I plugged the known values into the equation above and solved for I. I was then going to multiply that value by two. I am certain that is wrong, and that I am missing an important concept with regards to the problem. A shove in the right direction would be much appreciated!
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Old Nov7-09, 02:52 PM                  #2
rock.freak667

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Re: Current - two parallel conductors

I think you are going correct. I just can't recall the formula for the force, so I will assume the one you posted is correct.
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