Magnetic Field Along a Straight Wire with Current

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Homework Statement


Find the magnetic field 4.0 cm from a very long, straight wire that carries a current of 17.0 A.

Homework Equations



I don't know what equation to use



The Attempt at a Solution


I tried to find the equation for this question
 
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Answers and Replies

  • #2
rude man
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Try ampere's law.
 

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