Two concentric circular loops of radii|EMF| JEE-MAIN- 2022

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JEE MAIN 2022

26.07.2022_S2

Question

Two concentric circular loops of radii $r_1=30 \mathrm{~cm}$ and $r_2=50 \mathrm{~cm}$ are placed in $X-Y$ plane as shown in the figure. A current $\mathrm{I}=7 \mathrm{~A}$ is flowing through them in the direction as shown in figure. The net magnetic moment of this system of two circular loops is approximately

Select the correct option:

A

$\frac{7}{2} \hat{\mathrm{k}} \mathrm{Am}^2$

B

$-\frac{7}{2} \hat{\mathrm{k}} \mathrm{Am}^2$

C

$7 \hat{\mathrm{k}} \mathrm{Am}^2$

D

$-7 \hat{\mathrm{k}} \mathrm{Am}^2$

✓ Correct! Well done.

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