ABSTRACT
At the end of this chapter you should be able to:
• define mutual inductance • deduce that E2 = −M dI1dt , M = N2
, M = N1 d1dI2 and perform calculations • show that M = k√(L1L2) and perform calculations • perform calculations on mutually coupled coils in series • perform calculations on coupled circuits • describe and use the dot rule in coupled circuit problems
When the interaction between two loops of a circuit takes place through a magnetic field instead of through common elements, the loops are said to be inductively or magnetically coupled. The windings of a transformer, for example, are magnetically coupled (see Chapt er 20).
