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A small coil of radius r is placed at th...

A small coil of radius `r` is placed at the centre of a large coil of radius `R`, where `R gtgt r`. The two coils are coplanar. The mutual inductance between the coils is proportional to

A

`r//R`

B

`r^(2)//R`

C

`r^(2)//R^(2)`

D

`r//R^(2)`

Text Solution

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The correct Answer is:
B
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