Consider the wire shown in the figure above that has a current I0.
Two sections of the wire are straight and semi-infinite in length. They are
separated by a distance of n1/&pi meters. There are two other straight
pieces that are connected to a semi-circular piece of radius n2
meters. What is the magnitude of the magnetic field at the center of the semi-circle? If the
magnitude of the magnetic field is |B| = μ0I0/n3
Tesla, what is n3.
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