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The magnetic field at the centre of a ci...

The magnetic field at the centre of a circular coil of radius `r` carrying current `l` is `B_(1)`. The field at the centre of another coil of radius `2r` carrying same current `l` is `B_(2)`. The ratio `(B_(1))/(B_(2))` is

A

`1//2`

B

`1`

C

`2`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
C
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