A small magnet M is allowed to fall through a fixed horizontal conducting ring R. Let g be the acceleration due to gravity. The acceleration if M will be
a. less than g when it is above R and moving towards R
b. greater than g when it is above R and moving towards R
c. less than g when it is below R and moving away R
d. greater than g when it is below R and moving away R
As the magnet falls into the ring, the induced emf in the ring will oppose its fall (By Lenz's law). It will retard the fall, i.e. the value of g will decrease. Similarly when the magnet passes through the ring and goes away from it, it will be retarded, i.e. the value of g will decrease.
Hence, option C is correct.