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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Electromagnetic Induction

Olympiad workbook · NSEP · Electromagnetic Induction

A circular loop of radius r is placed inside another circular loop...

A circular loop of radius

r

is placed inside another circular loop of radius

R(R \gg r)

. The loops are coplanar and concentric. The mutual inductance

(\mathrm{M})

of the system is proportional to

Options

A $\frac{\mathrm{r}}{\mathrm{R}}$
B $\frac{r^2}{R}$
C $\frac{\mathrm{R}^2}{\mathrm{r}}$
D $\frac{\mathrm{r}^2}{\mathrm{R}^2}$

Correct answer

B. $\frac{r^2}{R}$

Step-by-step solution

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