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Infinte number of straight wires each c...

Infinte number of straight wires each carrying curret I are equally placed as show in the figure. Adjacent wire have currents in opposite direcation. Net magnetic field at point P is :

A

`(mu_(0)I)/(4pi)(ln2)/(sqrt3a)hatk`

B

`(mu_(0)I)/(4pi)(ln4)/(sqrt3a)hatk`

C

`(mu_(0)I)/(4pi)(ln4)/(sqrt3a)(-hatk)`

D

Zero

Text Solution

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The correct Answer is:
B
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