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 principle of tubelight ??? what is the function of starter and choke ???

1 Answers  

what is booster? and how it is connected in a circuit?

0 Answers   APTransco,

How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?

0 Answers   Vodafone,

What is third harmonic?what is the effect of it?

0 Answers   GMR,

Difference between field rheostat and armature rheostat.

0 Answers  

How to check VFD outgoing voltage

1 Answers  

hw to find transformer is in normal position? whether its in charged condition or not? except humming sound?

9 Answers   ABB,

which types of tests are required after commissioning of 6.6 kva tranformer?

3 Answers   Reliance,

difference between over current and over load protection?

5 Answers   BARC,

why ohms law does not obey semi-conducters?

2 Answers  

I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

0 Answers  

How to select earthing strip for 100kw induction motor ?

2 Answers