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A straight wire of length (2pi^(2)) metr...

A straight wire of length `(2pi^(2))` metre 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 circle 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`

Text Solution

Verified by Experts

The correct Answer is:
B
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