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Magnetic Field due to a finitely long wire

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Homework Statement


https://imagizer.imageshack.us/v2/935x701q90/540/k2taHx.jpg [Broken]

Homework Equations




The Attempt at a Solution


I think I got the idea to solve the B1 (the circular segment) and the ones that I wrote "zero", but I'm a bit confused on the straight ones (B2 and B3)....
I'm using the Biot-Savart law, but have no idea what goes inside the integral of (dl x r hat)/r2
 
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Answers and Replies

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haruspex
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Thanks for the help!

Therefore, is it correct if the total magnitude of B is B1+B2+B3 (where B2 and B3 are equal and in same direction), and all of them have a direction pointing into the page?
Sounds right.
 

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