The figure shows a square loop of side $5 \ cm$ being moved towards the right at a constant speed of $1 \ cm/s$. The front edge enters the $20 \ cm$ wide magnetic field $(B = 0.6 \ T)$ at $t = 0$. Find the $emf$ induced in the loop at $(a) \ t = 2 \ s$,$(b) \ t = 10 \ s$,and $(c) \ t = 22 \ s$.

• A
  $(a) \ 3 \times 10^{-4} \ V, (b) \ 0, (c) \ 3 \times 10^{-4} \ V$
• B
  $(a) \ 3 \times 10^{-4} \ V, (b) \ 3 \times 10^{-4} \ V, (c) \ 0$
• C
  $(a) \ 0, (b) \ 3 \times 10^{-4} \ V, (c) \ 3 \times 10^{-4} \ V$
• D
  $(a) \ 3 \times 10^{-4} \ V, (b) \ 0, (c) \ 5 \times 10^{-4} \ V$