Physics · 2020
JEE Main · 3 September 2020, Shift 1 · Q14
An elliptical loop having resistance R, of semi major axis a, and semi minor axis b is placed in a magnetic field as shown in the figure. If the loop…
An elliptical loop having resistance R , of semi major axis $\displaystyle a$, and semi minor axis $\displaystyle b$ is placed in a magnetic field as shown in the figure. If the loop is rotated about the $\displaystyle x$-axis with angular frequency $\displaystyle \omega$, the average power loss in the loop due to Joule heating is :
Official answer
(1)
$\displaystyle \frac{\pi^2 a^2 b^2 B^2 \omega^2}{2 R}$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.