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A wire shaped as a semi-circle of radi...

A wire shaped as a semi-circle of radius a rotates about sn sxis `OO'` with an angular velocity `omega` in a unifrom magnetic field of induction `B'` (Fig). The rotation axis is perpendicular to the field direction. The total resistance of the circuit is equal to `R`. NEglecting the magnetic field of the induced current, find the meand amount of thermal power being generated in the loop fueing a rotation period.

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