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Two coupled coils connected in a series have an equivalent inductance of 16 mH or 8 mH depending on the connection. The mutual inductance between the coil is
  • a)
    12 mH
  • b)
    8√2mH
  • c)
    4mH
  • d)
    2mH
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Two coupled coils connected in a series have an equivalent inductance...
Answer:  
d)2mH

SOLUTION
When 2 coupled coils are connected in series, the inductance of the overall arrangements is L1+L2+2M




Given: L1+L2+2M=16 L1+L2-2M=8
We get 4M = 8, M = 2mH.
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Most Upvoted Answer
Two coupled coils connected in a series have an equivalent inductance...
Leq = L1L22M = 16mH …(ii)
By solving (i) and (ii)
M = 2mH
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Community Answer
Two coupled coils connected in a series have an equivalent inductance...
Leq = L1L22M = 16mH …(ii)
By solving (i) and (ii)
M = 2mH
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Two coupled coils connected in a series have an equivalent inductance of 16 mH or 8 mH depending on the connection. The mutual inductance between the coil isa)12 mHb)8√2mHc)4mHd)2mHCorrect answer is option 'D'. Can you explain this answer?
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