An elliptical loop having resistance R, of semi major axis a, and semi minor axis b is placed in magnetic field as shown in the figure. If the loop is rotated about the x-axis with angular frequency $\omega $, the average power loss in the loop due to Joule heating is :

Question

${{\pi abB\omega } \over R}$

${{{\pi ^2}{a^2}{b^2}{B^2}{\omega ^2}} \over R}$

${{{\pi ^2}{a^2}{b^2}{B^2}{\omega ^2}} \over {2R}}$

Zero

Solution

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