Two concentric circular loops of radii r₁ = 30cm and r₂ = 50cm are placed in X – Y plane as shown in the figure. A current I = 7A is flowing through them in the direction as shown in figure. The net magnetic momentum of this system of two circular loops is approximately:

<p><strong>&nbsp;<math><mrow><mover accent="true"><mi>M</mi><mo>→</mo></mover><mo>=</mo><mi>I</mi><msub><mrow><mi>A</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>−</mo><mi>I</mi><msub><mrow><mi>A</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></strong></p><p><strong><math><mrow><mo>⇒</mo><mi>M</mi><mo>=</mo><mo>−</mo><mn>7</mn><mo>×</mo><mfrac><mrow><mn>2</mn><mn>2</mn></mrow><mrow><mn>7</mn></mrow></mfrac><mo>×</mo><mrow><mo> [</mo><mrow><mfrac><mrow><mn>2</mn><mn>5</mn></mrow><mrow><mn>1</mn><mn>0</mn><mn>0</mn></mrow></mfrac><mo>−</mo><mfrac><mrow><mn>9</mn></mrow><mrow><mn>1</mn><mn>0</mn><mn>0</mn></mrow></mfrac></mrow><mo>]</mo></mrow><mover accent="true"><mi>k</mi><mo>^</mo></mover></mrow></math></strong></p><p><strong><math><mrow><mo>⇒</mo><mover accent="true"><mi>M</mi><mo>→</mo></mover><mo>=</mo><mfrac><mrow><mo>−</mo><mn>7</mn></mrow><mrow><mn>2</mn></mrow></mfrac><mover accent="true"><mi>k</mi><mo>^</mo></mover><mtext> </mtext><mtext> </mtext><mi>A</mi><msup><mrow><mi>m</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></strong></p>

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