Emf across a rod, fan blade or disc rotating in a field

1. A.
   $5\mu V$
2. B.
   $50\mu V$
3. C.
   $5mV$
4. D.
   $50mV$

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1. A.
   $\frac{1}{4}{BL}^{2}\omega$
2. B.
   $\frac{1}{2}B^{2}L^{2}\omega$
3. C.
   $\frac{1}{4}{\text{ }B}^{2}\text{ }L\omega$
4. D.
   $\frac{1}{2}{BL}^{2}\omega$

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1. A.
   0.0628 V
2. B.
   0.5024 V
3. C.
   0.2512 V
4. D.
   0.1256 V

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