Mutual Inductance

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1. 1 2021 Electromagnetic Induction #
   Two conducting circular loops of radii $R_1$ and $R_2$ are placed in the same plane with their centres coinciding. If $R_1\gg R_2$, the mutual inductance $M$ between them will be directly proportional to:
   A $\frac{R_2}{R_1}$

   B $\frac{R_1^2}{R_2}$

   C $\frac{R_2^2}{R_1}$

   D $\frac{R_1}{R_2}$
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