Inductance and Transformers
What is generated when the magnetic field around the inductor collapses?
An opposing voltage called counter electromagnetic force (CEMF) that is proportional to the rate of the change in current.
What units are used to express inductance?
Henry
What is the opposition to alternating current above the resistance of the inductor to direct current called.
Inductive Reactance
What characteristics do ferrite Allows its use as core material in radiofrequency applications
Low electrical conductivity for less internal power loss at RF then other iron core transmitters
What enables a transformer to transfer electrical energy from circuit to another?
Mutual inductance
What is the induction of electromotive force into an inductor from the changing magnetic field lines around another inductor that encircle, or link, the turns of the Inductors called?
Mutual inductance
For the power in primary and secondary windings of a transformer to remain equal what must the current in the secondary windings do when the voltage is stepped up
The current in the secondary windings must step down in proportion to the voltage increase
What is the relationship of the inductive reactance of an inductor and frequency?
The higher the frequency the higher the inductive reactance
Whats Inductance?
The property by which voltage and current is included into a circuit by a changing magnetic field
When a circuit has several inductors, how is the total inductive reactance calculated?
The same way the total resistance of resistors in a circuit is determined
