Answer / dayal varma

universal motor will work in both ac and dc so in dc we
need a commutator

Answer / dileep mishra

universal motor work in both ac and dc so that commutator is
design for this motor. in dc motor commutator is use only
for direction.

Answer / gaurang

commutator is use to facilate the collection of current, so that we can use this electrical energy for our purpose. And commutator reversing the direction of current across one half of the pole and further reverses across another half of the pole so that we can get AC current or voltage.

What kind of maintenance is conducted for Transformer

0 Answers   Gulf, UB Engineering,

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what is p.s impedance measurement test in earthing transformer?

0 Answers   Greenko,

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i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if this answer is not right then tell me the right answer. post ur answer here or on my mail address. m.ikram786@yahoo.com m.ikram555@gmail.com. thanks.

1 Answers  

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ganaretors A check B check and C check details

1 Answers  

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what are the advantages and disadvantages of oil filled cables over XLPE cables

3 Answers   Areva, AUVA,

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sir i am apearing for nic exam.i dont know exam pattern.can you please send me some model papers

0 Answers  

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what is the difference between induction and synchronous motor?explain in simple words?why 3 phase motor is given preference over single phase motor.

10 Answers  

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where used impendence relay?

3 Answers  

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why we are using large cross section cable at load side and small at other (11kv to trsfr)side of transformer? when the load increses current at both side increases,right?

2 Answers  

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what is the burdon in case of relays?

1 Answers  

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what is extra low voltage system

3 Answers  

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give me applications of sequence bridges . (used in 3 phase un balanced systems)

0 Answers  

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