Question

What is the effect on the mutual inductance between the pair of coil when (i) the distance between the coils is increased? (ii) the number of turns in each coil is decreased? Justify your answer in each case?

Answer 1

1. When coil increased than induction is equal to change of rate of magnetic flux
2. When no. Of coil increases then the induction is equal to the proportional of no of coil increase and magnetic flux (which change in negative).
$e \: = - magnetic \: flux \: \div rate \: of \: \: change \: f$

Answer 2

I. the distance between the coils is increased.