Two conducting circular loops of radii R1 and R2 are placed in the same plane, with their centers coinciding. If R1>>R2, the mutual inductance M between them will be directly proportional to -
A
R22R1
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B
R1R2
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C
R2R1
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D
R21R2
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Solution
The correct option is AR22R1 Two concentric coils are of radius R1 and R2 as shown in the figure.