Magnetic feild in circular coil

AI Thread Summary
To find the current in a 20-turn circular coil with a length of 5.9 cm producing a magnetic field of 1.9 mT at its center, the formula B = (μ₀)nI is used, where n is the turns per unit length and I is the current. The user calculated n by dividing the number of turns by the coil's length but encountered an error, indicating the equation might be incorrect. Clarification on the correct application of the formula and the inclusion of the coil's length is necessary for accurate calculations. Suggestions for resolving the issue include ensuring the correct use of the magnetic constant and verifying the dimensions used in calculations. Accurate application of these principles is essential for determining the current in the coil.
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Homework Statement



A 20 turn circular coil of length 5.9 cm produces a magnetic field of magnitude 1.9 mT at its center. Find the current in the loop

Homework Equations



B=(moconstant)nI
where n is the number of turns per unit length and I is current. magnetic field is B


The Attempt at a Solution



so i put in .0019 T for B
i put in .059 m and divided 20 by that to find the turns per unit or m
i plugged them in with the constant and got a red x... any suggestions?
 
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Your equation isn't correct to begin with. What about the length of the coil?
 

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