A long straight wire along the z-axis carries a current I in the negative z direction. The magnetic vector field B at a point having coordinates (x, y) in the z = 0 plane is

Question:

Options :

(a) u0I ( yî- xj)/2π(x2 + y2)
(b) μ0l (xî+yj)/2π(x2 + y2)
(c) u01(xj-yî)/2π(x2 + y2)
(d) μ0l (xî-yj)/2π(x2 + y2)

Answer :

(a) u0I ( yî- xj)/2π(x2 + y2)

Answer Steps :

step 1:

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