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  • A coil of radius R carries current I. Another concentric coil of radius r (r << R) carries current i. Planes of two coils are mutually perpendicular and both the coils are free to rotate abou

A coil of radius R carries current I. Another concentric coil of radius r (r << R) carries current i. Planes of two coils are mutually perpendicular and both the coils are free to rotate about common diameter. The maximum kinetic energy of smaller coil when both the coils are released, masses of coils are M and m respectively, is

Option: 1

\mathrm{\frac{m \pi l i M R r^2}{2\left(M R^2+m r^2\right)}}


Option: 2

\mathrm{\frac{\mathrm{mlMRr}^2}{2\left(M R^2+m r^2\right)}}


Option: 3

\mathrm{\frac{\mathrm{m} \pi \mathrm{liMRr}{ }^2}{\left(M \mathrm{R}^2+m r^2\right)} }


Option: 4

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Answers (1)

best_answer

\mathrm{ P \cdot E(\max )=m B=\frac{\mu_o}{2 R} i \pi r^2 \\ }

\mathrm{ l_r \omega_r=I_R \omega_R \\ }

\mathrm{ \text { Ratio of energy }=1: \frac{m^2}{M R^2} }
 

Posted by

Pankaj Sanodiya

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