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Calculate the equivalent inductance when n inductors are connected in series of values L.

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Calculate the equivalent inductance when n inductors are connected in series of values L.

(a) n^2L H

(b) nL H

(c) .5L H

(d) 2 H

The question was asked in an online interview.

My question comes from Electric Motors topic in chapter Braking of Electric Motors of Electric Drives

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The correct choice is (b) nL H

For explanation I would say: When two inductors are connected in series their equivalent inductance is equal to the sum of the individual inductances. Leq=L+L+…..+n times L=nL H.

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