First slide

Inductance

Question

A circuit contains two inductors of self-inductance L₁ and L₂ in series (figure). If M is the mutual inductance, then the effective inductance of the circuit shown will be

Moderate

A

L₁ + L₂
B

$L_{1} + L_{2} - 2 M$
C

$L_{1} + L_{2} + M$
D

$L_{1} + L_{2} + 2 M$

Solution

When inductances are connected like this in series, then $L = L_{1} + L_{2} + 2 M$

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