Final answer:
When inductors are connected in series, their equivalent inductance is the sum of their individual inductances. In this case, the equivalent inductance is 108 mH.
Step-by-step explanation:
When inductors are connected in series, their equivalent inductance is the sum of their individual inductances.
To find the equivalent inductance, we add the values of L1, L2, and L3:
Leq = L1 + L2 + L3
Substituting the given values, Leq = 37 mH + 50 mH + 21 mH = 108 mH
Therefore, the value of the equivalent inductance is 108 mH.