Electromagnetic induction question

Question

When a circular loop enters a uniform magnetic field perpendicular to its plane with uniform velocity, how is the variation of induced EMF with time?

Answer 1

Initially, when the loop first enters the field, magnetic flux is established through the area encircled by the loop, and a current is induced around the loop that will try to produce an opposing magnetic field to cancel out the rising magnetic flux.  However, as the loop proceeds through the field at constant velocity and with no change in orientation, the magnetic flux will become constant, and that initial induced current will eventually die out.