Two conducting circular loops of radii $R_1$ and $R_2$ are placed in the same plane with their centre coinciding. If $R_1 >> R_2$ the mutual inductance $M$ between them will be directly proportional to
$\frac{{{R_1}}}{{{R_2}}}$
$\frac{{{R_2}}}{{{R_1}}}$
$\frac{{{R_1^2}}}{{{R_2}}}$
$\frac{{{R_2^2}}}{{{R_1}}}$
In $SI$, Henry is the unit of
The induction coil works on the principle of
What is the mutual inductance of a two-loop system as shown with centre separation l
Two coils of self inductances $2\, mH$ and $8\, mH$ Hare placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is......$mH$
A small square loop of wire of side $l$ is placed inside a large square loop of wire $L(L \gg l)$. Both loops are coplanar and their centres coincide at point $O$ as shown in figure. The mutual inductance of the system is.