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Ruitker
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Homework Statement
An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip?
Homework Equations
dB = (μ0*dI)/(2*∏*r)
The Attempt at a Solution
I evaluate the integral: ∫(μ0*I)/(2*∏*w)*(dr/r)
I am unsure of the limits and cannot get the correct answer.