The Motion of a Conducting Rod Through a Magnetic Field $\varepsilon$

Multiple Choice

The motion of a conducting rod through a magnetic field creates a motional EMF E.If the rod accelerates to twice the speed,what will the motional EMF be?

A) $\varepsilon$
B) 2 $\varepsilon$
C) $\varepsilon$ /2
D) 4 $\varepsilon$
E) $\varepsilon$ ²