A long straight wire, carrying current I...

A long straight wire, carrying current I, is bent at its midpoint to form an angle of `45^@`. Find the induction of magnetic field at point P, distant R from the point of bending (as shown in)

`((sqrt(2)-1)mu_(0)I)/(4piR)`

`((sqrt(2)+1)mu_(0)I)/(4piR)`

`((sqrt(2)-1)mu_(0)I)/(4sqrt(2)piR)`

`((sqrt(2)+1)mu_(0)I)/(4sqrt(2)piR)`

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