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

why Square root 3 used for three phase?

2 Answers  

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what is the difference betweem star connected motor & delta connected motor?

0 Answers  

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what is rotary ups?

2 Answers  

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Shunt reactor is used in EHV Transmission line for..............?

2 Answers   NTPC,

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7 Answers   Bajaj, JHM Hotels,

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5 Answers   ABC,

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4 Answers   ABB,

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6 Answers  

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0 Answers   ABB, Siemens,

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what is megar testing

4 Answers   NASA,

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How to Measure A.C Resistance for Earthing ?

2 Answers  

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What is the difference between type1 and type2 relay protection co-ordination for motor feeders

0 Answers   DAE,

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