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Question
what is the difference between ac and dc?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
1.Ac voltage or current
waveforms varry with time
and dc don't.
2. Polarity in ac does'nt
matter while in ac does.
 
Is This Answer Correct ?    4 Yes 1 No
Irshad
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
1.stranded resistance values of motors? 2.how to calculate the resistance values of single phase and 3phase motors? L&T 2
WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SIZES?? Dubai-Group 14
A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?   2
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Without seeing the nameplate descriptions of a rotating machine,Is it possible to say which one is a motor and which one is a generator? How would you certain this?   3
 
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