Answer / srikanth

When we compare in terms of power losses DC is best.
Commerical and Human saftey wise AC is best.

Answer / venkatesh vaidya

DC is the best source of power supply. Because we can store
the DC power in batteries, where as AC cannot be stored.
But for human safety purpose and universality AC has became
most economical way of production and consumption. Also in
case of power losses and harmonics DC holds up wrt to AC.
Generation of AC is quit simple wrt to DC, because
commutator and brushes are required in case of DC
production. AC is consumed as it is produced, ie; use it or
loose it. DC is exemption for this. there are many way by
which DC can be produced with out emitting CO2 to
environment, such as chemically, solar, etc. eventhough
there are some ways to produce AC ecofriendly, but there is
dispute of economy.

Answer / om prakash

Both source are best in own areas
For transmitter and distributors AC is the best, AC motor
is lighter than DC motor;
For traction load, electrolyte, arc lamp, dc is the best

if u want to buy a motor than what will be the configuration of that motor?

2 Answers  

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What are the advantages and disadvantages of the ac motors?

0 Answers  

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When calculating the speed of a rotor required for a particular frequency of synchronous generator we use the equation 60f/p Is this p is the number of pole pairs of rotor & do we consider the number of pole pairs in the stator is 1?

0 Answers   UOM,

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if name plate detals of a motor or any other is missing then how to find it

1 Answers  

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for any load, what happen if we use the cable rating above its normal rating

2 Answers  

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when a 500kva-400hz single phase transformer operated on a 100hz supply then what will be kva required

2 Answers  

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What is corkscrew rule?

0 Answers  

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what is the maximum load in MDB,SMDB and DB

1 Answers  

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what happen if we give 220 volts dc supply to d bulb r tube light?

4 Answers   Genus, RMSI,

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What are the various methods for effecive earthing in a factory in a rocky terrain, where soil resistivity is extraordinarily high? The usual method of 3 m deep earth pits is not serving the purpose.

4 Answers  

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can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??

0 Answers   MCB,

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is it possible to flow a current between nutral and earth in a circuit? although nutral and earth having same potential diffrence? i=0/r=0A if any body now any solid reason because i am getting a triping problem in rcbo due to nutral and earth shorting???

2 Answers  

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