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An infinitely long wire carrying current...

An infinitely long wire carrying current I is along Y-axis such taht its one end is at point A(0,b) while the wire extends upto `+oo`. The magnitude of magnetic field strength at point (a,0) is

A

`(mu_(0)l)/(4pi a)(1+(b)/sqrt(a^(2)+b^(2)))`

B

`(mu_(0)l)/(4pi a)(1-(b)/sqrt(a^(2)-b^(2)))`

C

`(mu_(0)l)/(4pi a)((b)/sqrt(a^(2)+b^(2)))`

D

None of these

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Knowledge Check

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