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Two long parallel wires going into the p...

Two long parallel wires going into the plane of the paper are separated by a distance R and carry a current I each in the same direction. Show that the magnitude of the magnetic field at a point P equidistance from the wires and subtending angle `theta` from the plane containing the wires is `B=(mu_0)/pi I/R sin2theta` What is the direction of the magnetic field?

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