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A long wire carrying a steady current is...

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. it is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns 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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AAKASH INSTITUTE ENGLISH-MOVING CHARGE AND MAGNESIUM-SECTION C
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