A) \[nB\omega {{l}^{2}}\]
B) \[\frac{1}{2}nB\omega {{l}^{2}}\]
C) \[\frac{1}{2}B\omega {{l}^{2}}\]
D) \[B\omega {{l}^{2}}\]
Correct Answer: C
Solution :
[c] each spoke will behave as a cell. Induced emf of each spoke \[=\frac{1}{2}B{{l}^{2}}\omega \] But all (n) identical spoke behaving as a cell can connected in a parallel fashion, so the resultant \[emf=e=\frac{1}{2}B{{l}^{2}}\omega \]= same as single cell.
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