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Magnetics question

2022 · 26 Jul · Shift 2 · Q54
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  5. /2022 · 26 Jul · Shift 2 · Q54

Magnetics question

2022 · 26 Jul · Shift 2 · Q54

JEE MainPhysicsMagneticsMCQ+4 / −1
Two concentric circular loops of radii r1=30 cmr_{1}=30 \mathrm{~cm}r1​=30 cm and r2=50 cmr_{2}=50 \mathrm{~cm}r2​=50 cm are placed in X−Y\mathrm{X}-\mathrm{Y}X−Y plane as shown in the figure. A current I=7 AI=7 \mathrm{~A}I=7 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 : JEE Main 2022 (Online) 26th July Evening Shift Physics - Magnetic Effect of Current Question 92 English
  1. A
    72k^ Am2\frac{7}{2} \hat{k} \,\mathrm{Am}^{2}27​k^Am2
  2. B
    −72k^ Am2-\frac{7}{2} \hat{k} \,\mathrm{Am}^{2}−27​k^Am2
  3. C
    7 k^ Am2{7}\, \hat{k} \,\mathrm{Am}^{2}7k^Am2
  4. D
    −7 k^ Am2{-7}\, \hat{k} \,\mathrm{Am}^{2}−7k^Am2
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