Fig. illustrates plane figures made of thin conductors which are located in a uniform magnetic field directed away from a reader beyond the plane of the drawing. The magnetic induction starts diminshing. Find how the currents induced in these loops are directed.

Explanation

According to Lenz, the sense of induced `e.m.f` is such that it opposes the cause of change of flux. In our problem, magnetic field is directed away from the reader and is diminshing.
So, in figure (a), in the round conductor, it is cloackwise and there is no current in the connector.
In Fig (b) in the outside conductor, clockwise. In Figure (c) in both the conductor, clockwise, and there is no current in the connnector to obey the charge conservation.
In Fig(d) in the left side of the figure, clockwise.