Question 73: Electromagnetic Induction

Question

Two coils of self inductance L
1
and L
2
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 L 1 and L 2 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: