Magnetic field created by a wire acts on the wire itself?

[physics user1]

So here is the problem, it asks me to find the total magnetic field on BA, i made a vectorial sum with the magnetic field generated by i1 and by i2 and i got the right result, but why not adding also the magnetic field generated by the wire itself? I mean generated by CD why isn't that correct? There is current i glowing in CD too, so it generates a magnetic field, why doesn't this add too? Basically I am asking: does a wire carriyng current generate a magnetic field that can imteract with that wire?
Please help me

 

[BvU]

You are correct. The exercise doesn't take these 'internal' forces into account because they don't influence the net force on the complete loop ABCD.

 

[physics user1]

You are correct. The exercise doesn't take these 'internal' forces into account because they don't influence the net force on the complete loop ABCD.

So... if it asks me the total magnetic field on BA and doesn't take under account the field generated by CD the book gave me a wrong result? Thanks

 

[BvU]

I agree. It asks for the total magnetic force on AB and for the total force on CD. The 75.6 $\mu$T in the answer for AB ignores the field produced by BC (88.4 $\mu$T)