Question

The current in a coil changes from 3.60 a to 1.80 a in the same direction in 0.490 s. if the average emf induced in the coil is 16.0 mv, what is the inductance of the coil?

Answer 1

According to Faraday's law,

emf across inductor = L
`(dI)/(dt)`
0.016 = L
`(3.6-1.8)/(0.49) = 3.673`
Therefore, L = 0.016/3.673 = 4.35×10⁻³ Henry