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A staright wire of length (pi^(2)) meter...

A staright wire of length `(pi^(2))` meter is carrying a current of `2A` and the magnetic field due to it is measured at a point distant `1 cm` from it. If the wire is to be bent into a circles and is to carry the same current as before, the ratio of the magnetic field at its centre to that obtained in the first case would be

A

`50:1`

B

`1:50`

C

`100:1`

D

`1:100`

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The correct Answer is:
D
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