[单选题]
The coil of a generator has 50 loops and a cross-sun e:r,b lyo o4zz.)d.ectionthsrv5,ar .o -,zyao0 al area of $0.25 \; m^{2}$. What is the maximum $emf$ generated by this generator if it is spinning with an angular velocity of 4.0 rad/s in a 2.0 T magnetic field?
A. $50 \; V$
B. $100 \; V$
C. $200 \; V$
D. $400 \; V$
