Why carbon brush used in dc motor also why its not used in ac motor?

2 Answers   RRB,

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what are the protection relays for trasformer

3 Answers  

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a transformer runs by electro-induction principle like all motors.then why dosen't it rotate just like any other motor

2 Answers  

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why we used to transmitt the power at higher voltage why not at lower voltage

8 Answers  

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what is per unit calculation?looking for simple and strong explanation thk u

0 Answers  

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what modulation is used in landline telephone signals?

2 Answers  

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what is ic 01,ic 06 ?is it types of cooling?

0 Answers   Bhel,

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what is the saturation point of crgo lamination.

0 Answers  

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keeping in view of parallel operation which of the 3 phase transformer connection are possible? a)delta-delta to delta-star b) delta-delta to star-delta c) star-star to delta-delta d) delta-star to star-delta

4 Answers   Ecil, Siemens,

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Why negative feedback is preferred in the control system?

0 Answers  

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i am going to give the JSEB,RANCHI exam for power plant,so i need some samples of papers related to that,so please send me these papers by my mail id.

0 Answers  

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Hi, We facing one similar problem in our computers i.e we are newly constructed our design department after that shifted our computers but our computer desktop screen is vibrating. we are conducted our electrical maintainance person he told that is UPS problem, then we changed the UPS also again we are facing that problem in that room only. then we put lcd monitors that problem is solved. But in other monitors why the computer desktop screen is vibrating please give a suggestion to me. Regards, Raju.N.G

10 Answers  

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