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Question

Two circular coils can be arranged in any of three situations as shown in the figure. Their mutual inductance will be:
942583_11319655757144428b1a521695793366.png

A
maximum in situation (i)
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B
maximum in situation (ii)
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C
maximum in situation (iii)
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D
same in all situation
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Solution

The correct option is A maximum in situation (i)

Mutual induction flux linkage between coils

  • Flux linkage in coil (i) is maximum because both coils have same axis.
  • Flux linkage between coils is 0 because thus axis are perpendicular to each other.
  • Flux linkage between coils is 0 because their axis are perpendicular to each other .

So, mutual inductance between coils is maximum in case (i).

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