What is the Magnetic Field at the Center of a Wire with a Loop?

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To calculate the magnetic field at the center of a circular loop in a wire carrying a current of 4.8 amperes, the relevant formula is μ₀I/2r, where μ₀ is the permeability of free space. The user initially calculated the magnetic field due to the loop as 0.0000392 T but found it to be incorrect. The error was identified as neglecting the contribution of the straight portion of the wire to the total magnetic field. The discussion emphasizes the importance of considering both the loop and the straight wire when calculating the magnetic field. Properly accounting for all components will yield the correct magnetic field value.
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Homework Statement



A very long wire carrying a conventional current of 4.8 amperes is straight except for a circular loop of radius 7.7 cm. Calculate the approximate magnitude of the magnetic field at the center of the loop.

I know that I=4.8A and r = .077m
u_o = 4*pi*(10^-7)

Homework Equations


\mu_{o}I/2r


The Attempt at a Solution



I have everything and have been getting .0000392 T for the answer, but it's wrong.

Please help! (ASAP Appreciated...) What am I doing wrong??
 
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You calculated the field due to the loop current correctly. I think you need to add to that the contribution to the magnetic field that comes from the straight part of the wire.
 
Yep, thanks a lot.
 

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