Practice # 6 AC Theory
Flashcard
•
Physics
•
Professional Development
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does it mean for one waveform to 'lead' another waveform?
Back
It means that the waveform reaches its maximum or minimum value before the other waveform.
2.
FLASHCARD QUESTION
Front
What is the effective value of a sine wave a measure of?
Back
The heating effect of the sine wave.
3.
FLASHCARD QUESTION
Front
What advantages are realized by using AC in airplanes?
Back
The power requirements can be met more efficiently due to the increasing number of electrically operated units.
4.
FLASHCARD QUESTION
Front
What is an instantaneous value of voltage or current?
Back
It is the induced voltage or current flowing at any instant during a cycle.
5.
FLASHCARD QUESTION
Front
What occurs at 90° in a sine wave of voltage?
Back
The largest single positive value.
6.
FLASHCARD QUESTION
Front
What occurs at 270° in a sine wave of voltage?
Back
The largest single negative value.
7.
FLASHCARD QUESTION
Front
How is the peak value related to the effective value in a sine wave?
Back
The peak value is 1.41 times the effective value.
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