Answer / manish meena

transformer works on mutual induction principle which
states that emf is induced in other coil if changing
magnetic flux is linked in nearby coil,therefore if dc is
used then there is no changing flux finally no emf.

Answer / sachin_pawaskar2001

Because Electromagnetic Induction effect will not take
place & transformer will not work.

Answer / vinayak khorate

AS TRANSFORMER IS STATIC DEVICE
TO INDUCE CURRENT IN ANY CONDUCTOR BASICALLY WE NEED MOVING
MAGANETIC FIELD OR THE CONDUCTORS SHOULD MOVE.....
IN AC CURRENT THE DIRECTION OF FLUX IS MOVING CONTINEOUSLY
SO THE CURRENT IS INDUCED IS THE WINDING (SECONDARY WINDING)
WHERE AS IN DC SUPPLY THE FREQUENCY IS ZERO AND THATS WHY
THERE IS NO LINKAGE OF VARIABLE FLUX IN SECONDARY SO NO
CURRENT INDUCED.THATS WHY WE USE ONLY AND ONLY AC SUPPLY IN
TRANSFORMERS

Answer / jiten

The transofer works on this formula
Vs = k f Ns Ac Bm
and Vs=Vp*(Ns/Np)
And there is f=fequency comes so in the case of DC f=0
Therefore, there is no electro megnetic action comes.

Answer / kk_london

some one said dc does not have flux, dc has flux but it is
constant means the polarity remains same incase of ac the
flux always keeps on changing and produces emf in the same
conductor due to self induction and produces emf in the
other conductor which is placed closely to it due to mutual
induction. It is the principle of transformer

Answer / balram raturi

transformer work on mutual induction ,if dc is apply to it
there is no back emf induced in secondary to limit
primary current .so transformer will burn

Answer / sa

DC source having Zero Frequency.

Answer / rakesh punia

in dc source there is zero frequency
whereas in ac source thefrequencuy is not zero.now what is
magnetic flux ?.basically magnetic flux is no of magnetic
lines of force passing through an small area.
when this magnetic lines change or fux changes emf or
current is produced.this is being proved by faraday.in ac
this phenomenon takes place due to variable frequency while
in dc frequeency is zero thus no emmf is produced thus no
mutual induction which prime principle of any transformer,

Answer / k.somasekhar

Because transformer works on the principle of mutual
induction which is not possible in DC power..

Answer / praful nandankar

we know dc will produce steady magnetic field and to induce
emf in transformer we need changing flux which is not
possible with dc current.Hence there will be no transformer
action.







praful nandankar

what is the internal working of star delta starter

0 Answers  

How much width of the land shall have to be left below the EHT line of 440 kv as per the rule. i am told that a corridor of 35 M width is to be left free below 220 kv line. please confirm

1 Answers  

I need model question papers for RRB section engineer Chennai... Please send to my E-mail Id:- maitheerainbow@gmail.com

0 Answers   NTPC,

what is droop?

13 Answers   Alstom, Bhel,

how we check vector group dyn7

1 Answers  

what is rotating transformer? what is the uses of it?i mean applicaitons?

5 Answers   First Lead,

WHAT IS THE SPECIFICATIONS CONSIDERED DURING DESIGN FOR THE OVER CURRENT RELAY?

3 Answers  

If we know the load for generator in KW then how it will be change to amps and also if we know the load in amps how it will change in KW and what Generator is good for that...suppose load is 500 amps 3phase......??

1 Answers  

How to convert KV into MV in a Transformer?. dont say multification of 1000.pls give practical convertion factor.

2 Answers  

how can maintaince the acb contactor moveing and fixing kit

0 Answers   Gulf Cement,

how to check capacitor in general

1 Answers  

power transmission pole used one support , that only for support or earthing

0 Answers