(a) A closed loop is held stationary in the magnetic field between the north and south poles of two permanent magnets held fixed. Can we hope to generate current in the loop by using very strong magnets ?
(b) A closed loop moves normal to the constant electric field between the plates of a large capacitor. Is a current induced in the loop (i) when it is wholly inside the region between the capacitor plates (ii) when it is partially outside the plates of the capacitor? The electric field is normal to the plane of the loop.
(c) A rectangular loop and a circular loop are moving out of a uniform magnetic field region (Figure) to a field-free region with a constant velocity v. In which loop do you expect the induced emf to be constant during the passage out of the field region? The field is normal to the loops.

Explanation

(a) No. We can obtain induced current by change in magnetic flux linked with coil. Here coil is stationary hence flux will not change.
(b) We can not have any induced current in either of two given cases because here magnetic flux does not exist. Hence, there can not be any change of magnetic flux.
(c) For rectangular loop, induced emf is `epsilon` = Bvl which can be taken constant till it comes out of the field perpendicularly, because here alongwith B and v, l also remains constant whereas in case of circular loop, length l is initially increasing and later it is decreasing. See the figure given below. Hence, in this case induced emf does not remain constant.

(d) Here, because of motion of two given magnets, magnetic flux towards R.H.S. goes on increasing with time. Hence, according to Lenz.s law, induced current should flow clockwise in the loop containing capacitor, as seen from right to left. So electric current should flow anticlockwise i.e. plate A will lose the electrons and plate B will gain the electrons. Such flow of electrons will make plate A positive with respect to plate B.