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A long wire carries a steady curent . It...

A long wire carries a steady curent . It is bent into a circle of one turn and the magnetic field at the centre of the coil is `B`. It is then bent into a circular loop of `n` turns. The magnetic field at the centre of the coil will be

A

`nB`

B

`n^(2)B`

C

`2nB`

D

`2n^(2)B`

Text Solution

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The correct Answer is:
b
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