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Two concentric circular coil,s one of small radius `r_(1)` and the other of large radius `r_(2)`, such that `r_(1) lt lt r_(2)`, are placed co-axially with centres coinciding. Obtain the mutual inductance of the arrangement.

A

`R_(1)//R_(2)`

B

`R_(2)//R_(1)`

C

`R_(1)^(2)//R_(2)`

D

`R_(2)^(2)//R_(1)`

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Knowledge Check

  • Two concentric circular coils, one of small radius r_1 and the other of large radius r_2 such that r_1ltltr_2 are placed coaxially with centres coinciding. Obtain the mutual inductance of the arrangement.

    A
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    A
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    `(pi mu_(0)r^(2))/(4R)`
    C
    `(pi mu_(0)R^(2))/(4r)`
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  • A soap bubble of radius r_(1) is placed on another soap bubble of radius r_(2)(r_(1) lt r_(2)) . The radius R of the soapy film separating the two bubbles is :

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    B
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