A rectangular wire loop of slides $8 \;cm$ and $2\;cm$ with a small cut is moving out of a region of uniform field of magnitude $0.3T$ directed normal to the loop. What is the $emf$ developed across the cut if the velocity of the loop is $1\;cm/s$ in a direction normal to the shorter side of the loop. For how long does induced voltage last in each case.

Question

$(a)\; 0.6 \times 10^{-4}V; 2s$
$(b)\; 0.6 \times 10^{-4}V; 8s$
$(c)\;2.4 \times 10^{-4}V ; 8s$
$(d)\; 2.4 \times 10^{-4}V; 8 s$