Two circular loops are placed with their centres separated by a fixed distance. How would you orient the loops to have (a) the largest mutual inductance (b) the smallest mutual inductance?
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Explanation:
(a) The largest mutual inductance
The two circuits should be positioned coaxially for the greater mutual inductance. In this case, the largest flux is due to another circuit through a loop; hence the largest is reciprocal inductance.
(b) The smallest mutual inductance
The two circuits should be positioned for the smallest reciprocal inductance, So its axes are parallel to one another. In this case, the smallest (zero) is the flux via a circuit because of the another loop; thus, the smallest is the reciprocal inductance.
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