[Physics] Factors affecting magnitude of induced emf in coil

Question

Does the magnitude of emf induced in a coil depend only on the rate of change of flux?

Does it depend also on the amount of flux linked to it?

Will the change of flux from $50 ~H$ to $40 ~H$ and $10 ~H$ to $0 ~H$ produce same e.m.f?

Answer 1

I mean will flux chng from 50H to 40H and 10H to 0H produce same e.m.f?

Yes, if the rate of change or the velocity of change is the same in both cases and the coil have same number of turns. To sum up, rate of change of flux with respect to time produces an emf regardless of the amount of flux. The quantitative rule goes by the name Faraday's Law.