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Two coil of self inductance L1 and L2 are placed closed to each other so that total flux in one coil is completely linked with other. If M is the mutual inductance between them, then :
  • a)
  • b)
    M = L1/L2
  • c)
    M = (L1L2)2
  • d)
    M = L1L2
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Two coil of self inductanceL1andL2are placed closed to each other so t...
When the flux changes in the second coil due to change in the current in first coil, then the mutual inductance is given by the relation.
Similarly, when flux changes in first coil due to change in the current in second coil.

From the Reciprocity Theorem
M21 = M12 = M
From (iii) and (iv)
Multiply (v) and (vi)
 
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Most Upvoted Answer
Two coil of self inductanceL1andL2are placed closed to each other so t...
When the flux changes in the second coil due to change in the current in first coil, then the mutual inductance is given by the relation.
Similarly, when flux changes in first coil due to change in the current in second coil.

From the Reciprocity Theorem
M21 = M12 = M
From (iii) and (iv)
Multiply (v) and (vi)
 
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Two coil of self inductanceL1andL2are placed closed to each other so that total flux in one coil is completely linked with other. IfMis the mutual inductance between them, then :a)b)M = L1/L2c)M = (L1L2)2d)M = L1L2Correct answer is option 'A'. Can you explain this answer?
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