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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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Knowledge Check

  • Along wire carries a steady current. It is bent into a circle of one tum and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of N tums. The magnetic field at the centre of the coil will be

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  • A long wire carries a steady current. It bent into a circle of one turn and 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 :

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    `2n^(2)B`
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    • DC PANDEY-MAGNETIC FIELD AND FORCES-Medical entrance s gallery
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