question: Q:A magnetic field is directed perpendicular to the plane of a circular coil of area 0.2 m^2 and 250 turns. If the magnetic field is increased from 0.01 T to 0.06 T during a time interval of 0.25 s, the average induced EMF in the coil is? 
  A:0.04 V;B:0.1 V;C:2.5 V;D:10 V