Three coils are connected as in the following figure with self-inductances and mutual inductances as indicated. The effective inductance of the circuit across the terminal AB in the figure, is
1
9 H
2
21 H
3
11 H
4
6 H
5
Question Not Attempted
Three coils are connected as in the following figure with self-inductances and mutual inductances as indicated. The effective inductance of the circuit across the terminal AB in the figure, is