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How does the mutual inductance of a pair of coils change when (i) distance between the coils is increased and (ii) number of turns in the coils is increased? [AI 2013]

Answer»

Explanation:  MARK my answer as braliest(i) Mutual inductance decreases. (ii) Mutual inductance increases.It CAUSES DECREASE in magnetic flux linked with the coil C2. Hence induced emf in coil C2 decreases by relation ε2 = – dφ2/dt. Hence mutual inductance decreases.  (ii) From relation M21 = μ0n1n2Al, if number of turns in one of the coils or both increases, means mutual inductance will increase.



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