Network Theory Lec-35(a) : Magnetically Coupled Circuits

In this Lecture, Concept of Magnetically Coupled Circuit is Explained. And what is mutual inductance for different cases is discussed.

[sujathagangireddy]

At 25:26 flux direction is understood. my question is why do put 2 dots there or why we use them? Is the dots means flux direction from one dot to another is it saying that or what is the physical meaning of those 2 dots?

[premkumar-vmfd]

In last four cases there should be four equations for each case know?

[akshayalk]

Sir what are the subjects that u finished completely?

[sujathagangireddy]

26:20 how did you write the postive signs for M21 and M12? Plz reply sir. It is difficult to understand. when flux adds you wrote + otherwise - ??