The mean diameter of a silicon iron ring is 100 mm and its cross-sectional area is 500 mm2. The ring has a coil of 600 turns. When a current of magnitude 0.8 A is passed through the windings, the relative permeability of 4000 is observed. What will be the induced emf (approximately) when the current is reduced to zero in 60 ms?
1
-27 V
2
27 V
3
-38 V
4
38 V