Magnetic Field Due to a Circular Loop

[JamesL]

"A conductor consists of a circular loop of radius .0584 m and straight long sections. The wire lies in the plane of the paper and carries a current of 9.68 A.

Determine the magnitude of the magnetic field at the center of the loop. Answer in units of T."

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Perhaps I am not taking into account the long straight sections, but i believed that they did not affect the mag field at the center of the loop, correct?

Anyway,

using B = (u*I)/(2*pi*r), i got an incorrect answer. is this formula incorrect?

 

[Claude Bile]

The formula you used applies for a straight wire and is thus incorrect.

You need to modify your formula by multiplying by the total length of wire around the loop.

Claude.

 

[Tide]

You might want to recall what you learned about Biot-Savart.