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Two long parallel wires are at a distance $\dpi{100} 2d$ apart. They carry steady equal currents flowing out of the plane of the paper as shown. The variation of the magnetic field $\dpi{100} B$ along the line $\dpi{100} XX'$    is given by

• Option 1)

• Option 2)

• Option 3)

• Option 4)

As we learnt in  Force between two parallel current carrying conductors - - wherein I1 and I2 current carrying two parallel wires  a-seperation between two wires     The magnetic field varies inversly with distance for a long conductor. Option 1) Incorrect Option 2) Correct Option 3) Incorrect Option 4) Incorrect
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