Alternating Current (AC)

What is the greatest advantage of AC?

It can be transformed.

A transformer permits what from doing what?

Permits voltage to step up or down.

A high voltage transmission requires less ____ to produce ______.

Requires less power to produce the same amount of power.

Ac waveforms vary depending on what?

How the current is produced.

Name the three Ac waveforms.

Square Wave, Triangle Wave, Sine Wave.

Converting AC to DC.

Rectification

Most common AC wave form, produced by all rotating machines, and contains a total amount of 360 electrical degrees.

Sine wave

Each complete waveform of 360 degrees.

Cycle, Period, Wavelength

The number of complete cycles that occur in one second and is measured in hertz(Hz).

Frequency

Voltage at any point of the waveform is equal to the ____ value times the __ of the angle of rotation.

Maximum/peak.

sine.

This is the most common frequency in the United States and Canada.

60Hz(Hertz)

RMS is peak x what?

.707

Average value is based off of ___ .

Ripple or pulsating DC.

What are peak to peak values measured from?

From the maximum value in the positive direction to maximum value in the negative direction.

Average values must be found when a sine waves AC voltage is what?

Changed into DC with a rectifier.

What is wavelength

The distance the radiating field or signal can travel during one cycle of alternating voltage.

What are the three loads of a AC circuit ?

Resistive, Inductive, and Capacitive

Resistive loads contain what?

Pure resistance

What are two characteristics of resistive loads?

Produces heat, and the current and voltage are in phase with each other.

One wavelength is 0 to what?

0 to 360

What is VARS?

Power in an Inductive(L) and Capacitive(C) circuit.

Resistive loads have what power?

True power.

True Power can be produced when?

Only when current and voltage are either both positive or both negative.

What is the Skin Effect in an AC circuit?

Ac induces eddy currents into the conductor.

Resistance is the ___ to ____ in an AC or DC circuit.

Opposition.

Current flow.

Reactance is the ___ to ___ in an AC circuit (inductive and Capacitive circuit).

Opposition.

Current flow.

Impedance(z) is the total ____ to ____ in an ___ circuit.

Opposition.

Current flow.

Electrical.

What is Resistive, Capacitive, and Inductive loads unit of measure?

Ohms.

Inductive Reactance abbreviation is ___ and Capacitive Reactance is ____.

XL and XC

What is RMS?

Effective Voltage, Source Voltage, and Applied Voltage.