Define magnetic flux linkage.
A solenoid of diameter 
and 540 turns is placed in a uniform magnetic field as shown in the figure below.
The variation with time 
of the magnetic flux density is shown in the graph below.
Calculate the maximum magnitude of the induced electromotive force (e.m.f.) in the solenoid.
, the number of turns 
and the area 
perpendicular to the magnetic field.
.
