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A long straight wire in the horizontal p...

A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire

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`4 xx 10^(-6) ` , vertical up
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Knowledge Check

  • A long staright wire along the z axis carries a current I in the negative z direction the magnetic vector field vecB at a point having coordinates (x,y) in the z=0 plane is

    A
    `(mu_0i)/(2pi)((yhati-xhatj))/((x^2+y^2))`
    B
    `(mu_0i)/(2pi)((xhati-yhatj))/((x^2+y^2))`
    C
    `(mu_0i)/(2pi)((xhatj-yhatj))/((x^2+y^2))`
    D
    `(mu_0i)/(2pi)((xhati-yhatj))/((x^2+y^2))`

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