Power dissipated by a coil rotating in a magnetic field (a.c. generator)

1. A.
   $\frac{N^2 A^2 B^2 \omega^2}{2R}$
2. B.
   $\frac{BNA\omega}{R}$
3. C.
   $\frac{BNA\omega}{2R}$
4. D.
   $\frac{N^2 A^2 B^2 \omega^2}{R}$

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1. A.
   6 W
2. B.
   9 W
3. C.
   12 W
4. D.
   24 W

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