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Exam (elaborations)
Electronics ETA AC Certification Practice Exam 2024 questions and complete correct answers
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---24April 20242023/2024A+
- In alternating current: 
 
A. current flow alternates back and forth 
B. voltage alternates positive and negative 
C. resistance changes between high and low 
D. A and B above - correct answer D. A and B above 
 
Historically, DC came before AC because: 
 
A. DC is more useful 
B. DC is easier to transmit over long distances 
C. AC requires more advanced technology 
D. AC is less efficient - correct answer C. AC requires more advanced technology 
 
An AC voltage source schematic symbol: ...
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