5 Alternating Currents

What is a DC Voltage

A DC voltage is a voltage that does not change polarity. Voltage at points A will always be higher than voltage at point B.

What are sources for direct currents

Dry cells, PSU

What is an alternative current

It us a current that changes directions periodically

What is an AC voltage

It is a voltage that changes periodically

Describe a DC voltage graph

The graphs are always positive which indicates that there are no changesin the direction of the current and polarity if the voltage.

Describe an AC voltage graph

Parts of the graph are positive and other parts are negative. The direction of the current and polarity of the voltage of the positive parts are opposite to those of the negative parts.

Name the types of periodic waveforms

Sinusoidal, rectangular, square, and triangular

What is the peak voltage

It is the voltage measure from the DC Level to the highest point if the waveform

What is the peak-to-peak voltage

It is the voltage from the lowest to highest point of the waveform

What is the period

It is the time taken to produce one cycle of the waveform

What is the DC level of the waveform

It is the voltage level which the waveform oscillates about

What is the duty cycle

It is the percentage of time of the waveform at the peak