Homework - Alternating Current Basics Flashcards
The number of complete cycles per second is the [ Select ] of AC and is expressed in [ Select ].
Answer 1:
frequency
Answer 2:
hertz
In an AC circuit, the product of the voltage and the current is the [ Select ] and is expressed in [ Select ].
Answer 1:
apparent power
Answer 2:
volt-amps
The maximum difference between the positive and negative peak values of alternating voltage or current is called the ______ __ _____ value.
peak - to - peak
A ______ is one complete sequence of voltage or current changes from zero to a positive peak to zero, then through a negative peak, and back to zero.
Answer 1:
cycle
Another name for the RMS value of AC is the ______ value.
Answer 1:
effective
A(n) ________ is one-half of an AC cycle.
Answer 1:
alternation
True power in an AC circuit is express in terms of _____.
Answer 1:
watts
The average value of alternating current is calculated by multiplying _____ by the peak value.
Answer 1:
.637
Two advantages of alternating current over direct current are:
easy to generate
easy to change voltage and current
The time required for one cycle of events to occur is known as the ______ of alternating current.
Answer 1:
period
A purely resistive circuit has a power factor of __ .
Answer 1:
1
The RMS value of AC is ____ times peak value.
Answer 1:
.707
The maximum value of voltage in either the positive or negative direction is known as the ____ voltage.
Answer 1:
peak
The frequency of most house current in the USA is ___ hertz.
The frequency of most house current in Europe is [ Select ] hertz.
The AC power used in most aircraft is [ Select ] hertz.
Answer 1:
60
Answer 2:
50
Answer 3:
400
