Question

Two coil A and B have coefficient of mutual inductance M=2H. The magnetic flux passing through coil A charges by 4 Weber in 10 seconds due to the change in current in B. Then
A. change in current in `B` in this time interval is `0.5 A`
B. change in current in `B` in this time interval is `2 A`
C. change in current in `B` in this time interval is `8 A`
D. a change in current of `1A` in coil `A` will produce a change in flux passing through by `4` Weber.

Answer 1

Correct Answer - B
`phi=MI implies Deltaphi=M DeltaI`
`4=2xxDeltaI implies DeltaI=2 Amp`.