Chapter 14 Vocabulary

Front 1

Average or real power

Back 1

The power delivered to and dissipated by the load over a full cycle.

Front 2

Complex conjugate

Back 2

A complex number defined by simply changing the sign of an imaginary component of a complex number in the rectangular form

Front 3

Complex number

Back 3

A number that represents a point in a two-dimensional plane located with reference to two distinct axes. It defines a vector drawn from the origin to that point.

Front 4

Derivative

Back 4

The instantaneous rate of change of a function with respect to time or another variable

Front 5

Leading and lagging power factors

Back 5

An indication of whether a network is primarily capacitive or inductive in nature. Leading power factors are associated with capacitive networks and lagging power factors with inductive networks.

Front 6

Phasor

Back 6

A radius vector that has a constant magnitude at a fixed angle from the positive real axis and that represents a sinusoidal voltage or current in the vector domain.

Front 7

Phasor diagram

Back 7

A "snapshot" of the phasors that represent a number of sinusoidal waveforms at t=0

Front 8

Polar form

Back 8

A method of defining a point in a complex plane that includes a single magnitude to represent the distance from the origin and an angle to reflect the counterclockwise distance from the positive real axis.

Front 9

Power factor (Fp)

Back 9

An indication of how reactive or resistive an electrical system is. The higher the power factor, the greater is the resistive component.

Front 10

Reactance

Back 10

The opposition of an inductor or a capacitor to the flow of charge that results in the continual exchange of energy between the circuit and magnetic field of an inductor or the electrical field of a capacitor.

Front 11

Reciprocal

Back 11

A format defined by 1 divided by the complex number.

Front 12

Rectangular form

Back 12

A method of defining a point in a complex plane that includes the magnitude of the real component and the magnitude of the imaginary component, the latter component being defined by an associated letter j.