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Physics Magnetic Fields

Find the magnitude of magnetic field .
Express the magnitude of magnetic field in terms of the given quantities and the constants  and . You may or may not use all given quantities.



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da_emerson
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A long wire carries current . The wire is straight except for one square-shaped "half-loop" KLMN as shown.    Find the magnitude and the direction of the magnetic field  at point P. Assume that  is a known quantity.
the question is:
Find the magnitude of magnetic field .
Express the magnitude of magnetic field in terms of the given quantities and the constants  and . You may or may not use all given quantities.
The constant are (the greek letter MIU 0) I and r and Pi.
thank you
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aburr
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well, your right! but the they question is completing step by step by program called Mastering Physics, and i already did the most part of the question, the part that i have problem is with finding the magnitude of the
B(net), in term of Permeability constant and (r)and (I) and (pi).
if you can help me with this i'll be appreciated
thank you
If you know what the field around a long straight wire looks like you are more than half way to the answer.
Can you write the equation for the field from a long staight wire as a function of the distance from the wire?
What is the direction of that field?

Can you answer the five questions in my last post?
Can you answer the two additional physics question in this post?
Complete directions for this home work type problem were given
Force accepted.
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