what happens in a genarator when rotor supplied with ac
instead of dc

Answer Posted / ramireddy

if we give ac to rotor of alternator ,for positive half
cycle one pole act as north and anothor work as south. for
another half cycle same pole act as south and another act
as north so no rotation of rotor takes place. machine does
not start

Is This Answer Correct ?    3 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

1588


how can we calculate the ampacity of the electrical wire/cable. and what are the factors must be considered. pls. elaborate.

1740


IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?

3175


how to calculate cooling requirement of datacentre from electrical load?

1855


what happen if the load connected to the induction motor is taken away? the same question for synchoronous generator in synch i think that the the exitation voltage will appear on the terminal only if so plz answer me

1525






Sir pl provide 5 year sample paper for post junior engineer(electrical).I have currently applied for junior engineer (electrical) on RRB Ajmer

3181


hi frnz,can somebody give me any project work? i am a 2nd year student & interested in practical works...plz give me some projects

1494


Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

1628


Why are short circuit ratings always 16kA,25kA,36kA and 50kA.Who has fixed these?

3808


What is Plank's Law?

680


what happened when we supply a dc current in dc motor?? can it worked properly?

1452


how can we select the type of wire.what factors we have to look on it , do we have some formula to calculate it. please guide me on it

1490


Hello seniors m an engineering student in 3rd yr..i want to know what are the software course in electrical field?i wanted to do certification course but i dont know much about the course?..Regards

1648


how to determine Sq.mm size of finolex power cables.

1530


Single line diagram for dbb (double bus bar)system.

1458