Answer
$emf=48.1mV$
Work Step by Step
We know that;
$emf=BLv$
We plug in the known values to obtain:
$emf=0.350\times 0.25\times 0.55=0.048125=0.0481\approx48.1\times 10^{-3}$
Therefore, $emf=48.1mV$.
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