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A wire is bent into the shape shown in figure (a), and the magnetic field is measured at P1 when the current in the wire is I . The same wire is then formed into the shape shown In figure (b), and !he magnetic field measured at point P₂, when the current Is again I . If the total length of wire is the same in each case? what is B₁ & B₂.

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$B_{1} = \frac{μ_{0} I}{4 πl} [\sqrt{2} - \frac{1}{\sqrt{2}}]$

$B_{1} = \frac{μ_{0} I}{4 πl} [\sqrt{2} + \frac{1}{\sqrt{2}}]$

$B_{2} =$ $π (\frac{μ_{0} I}{4 l})$

$B_{2} =$ $π (\frac{μ_{0} I}{16 l})$

answer is A, B.

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