A steady current I is flowing in the –x direction through each of two infinitely long wires at y = \pm \frac{L}{2} as shown in the figure. The permeability of the medium is \mu _{0}. The B^{\to} – field at (0, L, 0) is

Correct Answer is : −4µ0I3πLz^

−\frac{4\mu _{0}I}{3\pi L}z^{\^}

+ \frac{4\mu _{0}I}{3\pi L}z^{\^}

−\frac{3\mu _{0}I}{4\pi L}z^{\^}

GATE Electrical Engineering (EE) 2015 Shift 1 Solved Paper

Question : 22 of 65

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A steady current I is flowing in the –x direction through each of two infinitely long wires at

y = ± \;{L}/{2}

as shown in the figure. The permeability of the medium is

µ _{0}

. The

B↖{→}

– field at (0, L, 0) is

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