SSC JE Electrical Engineering 2013 Paper

Question : 198 of 200

Marks: +1, -0

Two coupled coils, connected in series, have and equivalent inductance of 16 mH or 8 mH depending on the connection. The mutual inductance between the coils is

12 mH
$8 √2$ mH
4 mH
2 mH

Validate

Solution:

L_\eq=L_1+L_2+2M=16mH

...(i)

L_\eq. = L_1 + L_2 - 2m = 8 mH

...(ii)
by solving (i) and (ii)

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