Answer / saravanan.p

The Transformer is working based on the principle of mutual
induction(M) between primary and secondary winding.
(M = L. dt/dI). This induction comes due to the magnetic
flex produced by AC supply.

In DC, No meaning of flex. So induction between two
windings is not possible. thus when we are giving DC supply
to Primary winding, It act as a normal conductor.

Due to copper loss of the winding, the heat will increases
and this will affect the winding including insulation
strength.

Answer / biman mandal

d) Burn the winding

Answer / baljinder singh

First of all ,when we give the dc supply to
transformer,flux set up around the winding or in core ,but
this flux is statoinary and not link with winding so there
is not produce the back emf .The resistence of primary is a
few ohm(1-5).According to ohm law I=V/R .
When voltage applied across ,the back emf is not
produce ,resistence is very low ,so heavy current flowing
throw it .The winding will burn.

Answer / bidesh biswas

(D)burn the winding.

Answer / sourav sarkar

burn the winding

Answer / suryasish bhattacharjee

Burn the winding

Answer / ramesh molli

T/F WORKS ON THE PRINCIPLE OF MUTUAL INDUCTION. BUT IN DC
THERE IS NO MUTUAL INDUCTION, SO T/F NOT WORKS ON DC SUPPLY.

Answer / puja sinha

b)it will not work.because a transformer works on the
principle that an alternating flux is produced bya an
alternating quantity that oppose the main field.if the
supplied quantity is not alternating <alternating flux is
not produced and the transformer will not work.

Answer / puja sinha

b)it will not work.because a transformer works on the
principle that an alternating flux is produced bya an
alternating quantity that oppose the main field.if the
supplied quantity is not alternating <alternating flux is
not produced and the transformer will not work.

Answer / abhishek

d)burn the winding
Ans-If we apply dc supply across the transformer primary side,there will be no pulsating or alternating flux in the transformer core.Hence there will be no mutual as well as self induced emf as the flux is not a time varying one.As there is no self induced emf in transformer primary,there will be no back emf and as transformer primary resistance is low,there will be a high current in the primary side.Hence high copper loss and it will damage the winding insulation.

we use 3 phase supply for induction motor why not use two phase supply .

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