$19.$ A flat circular coil has area A and N turns. It is placed in a magnetic field B that is perpendicular to the plane of the

coil. The B field varies periodically with time via the function B $=$ B$0$cos$($t$),$ where $$ is the angular frequency. Find an

expression for the peak magnitude of the EMF Emax induced in the coil?

A$)$ Emax $=0$

B$)$ Emax $=$ AB$0$

C$))$ Emax $=$ NAB$0$

D$)$ Emax $=$ NAB$0$

E$)$ Emax $=$ A$$