I need help with the question listed above. The answer is included. I need help

Question

I need help with the question listed above. The answer is included. I need help solving the problem so I can get the correct answer. Please show a detailed explanation. I need help with the question listed above. The answer is included. I need help solving the problem so I can get the correct answer. Please show a detailed explanation.

Explanation / Answer

We can see when two wires have the same direction => directionof magnetic field of each wire at mid way are opposite obviously, they have the same magnitude so the total magnetic fieldis zero=> B = 0 T if they are opposite directions, then the magnetic field have the same direction and use this formula to get your answer => B= B1+ B2 =2*µo*I/(2pd)

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