Question 88: Electromagnetic Induction

Question

Two coils of self inductance L1 and L2 are connected in series combination having mutual inductance of the coils as M. The equivalent self inductance of the combination will be :

Accepted Answer

Self inductances are in series but their mutual inductances are linked oppositely so equivalent self inductance
L = L
1
+ L
2
$$-$$ M $$-$$ M = L
1
+ L
2
$$-$$ 2M

Answer

$${1 \over {{L_1}}} + {1 \over {{L_2}}} + {1 \over M}$$

Answer

$${L_1} + {L_2} + M$$

Answer

$${L_1} + {L_2} + 2M$$

Answer

$${L_1} + {L_2} - 2M$$

Electromagnetic Induction

Two coils of self inductance L1 and L2 are connected in series combination having mutual inductance of the coils as M. The equivalent self inductance of the combination will be :

Choose the correct answer: