Exam 4: Series Circuitsresistance and Impedance

Because of the skin effect, there is more useful copper conducting area with alternating current.

Reactors that have a high Q value are often treated as pure inductors, and the amount of wire resistance is ignored because it is such a small part of the total impedance of the coil.

To obtain high values of inductance, ____________________ cores are usually required.

The ____________________ of a coil is the result of the combination of the effective resistance and inductive reactance.

Explain eddy current loss.

The impedance section of each circuit considered consists of a reactor having a relatively large inductive reactance compared to the effective resistance.

A large Q is desirable because it means that the useful inductive reactance is high and the effective resistance is low.

The name ____________________ is given to the action whereby alternating current is forced toward the surface of a conductor.

Describe dielectric losses.

What is the figure of merit?

A low value of Q means that the resistance component is relatively low.

The power factor of the entire series circuit is the ____________________ of the total correct power in watts to the total apparent power in volt-amperes.

Describe the effective resistance effect.

The base of an impedance triangle represents the ____________________.

Explain hysteresis losses.