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B0 is the magnetic field at point P fir ...

`B_0` is the magnetic field at point P fir s given straight wire as shown in figure. If this wire is bent into a circular loop,then magnetic field at the center of the loop is

A

`sqrt2piB_0`

B

`(piB_0)/sqrt2`

C

`sqrt2pi^2B_0`

D

`(pi^2B_0)/2`

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