What Is the Correct Magnetic Field Strength at the Surface of a Wire?

AI Thread Summary
The discussion revolves around calculating the magnetic field strength at the surface of a wire carrying a uniform current. The initial question involves finding the magnetic field strength at a distance of 0.10 meters from the wire's axis, which was correctly answered as 4G. However, the calculation for the magnetic field strength at the surface of the wire was incorrect, with the user arriving at a value of 0.001 using the permeability constant and the formula involving current and distance. The conversation emphasizes the need for clarity in units within the problem statement to avoid confusion. Accurate calculations and understanding of magnetic field equations are crucial for solving such physics problems effectively.
Lance WIlliam
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b]1. Homework Statement [/b]

What is the magnetic field strength 0.10 from the axis of a 1.0--diameter wire carrying 5.0 distributed uniformly over its cross section?
The answer is 4G I got the part right
Part B

What is the field strength at the surface of the wire?
I got this wrong...

Homework Equations




I got .001 I used the eqn (I can't find the symbol) but its the pereability consant...
so... (u_0_)(I)/2*pi*r

so...(4pi.e-7)(5)/2pi(.1e-3)



I got .001...
 
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Please provide the units in the statement of the problem.
 

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