Answer / manish

transformer windings will burn

Answer / d.k. gupta

transformer induces e.m.f. due to rate of change of flux ,
which is only possible in a.c. supply in stationary
machines, if we will give d.c. supply as input there will
be no out put & due to core saturation after some time it
will be got damaged(burn).

Answer / vedpraksh uppadhaya

transformer works on mutual induction principal & we no
that an ac current change with time due to which flux
generate. if we provide dc to the transformer their is no
linkage of flux to secondary wdg. hense we will not get
anything in secondary or output

Answer / mayilsamy ranganathan

When Dc supply is given to primary of transformer it draws
heavy current from the DC source due to absence of back emf
and burnt out.Because the dc current not varying with time
it has constant value throught the period.
(AC is given to transformer the sinusoidaly varying
current creates a sinusoidaly varying flux ,this flux cuts
the stationary primary coils and creats a back emf,
(statically induced emf)this back emf opposes the applied
voltage source to drive current(Lenz law) so current is
limited by this back emf hence no overdrawal of current
from source,this is not happen while applying dc)

Answer / nithi

ANSWER:Nothing will happen.But fuse will blown off.

EXPLANATION: While applying DC voltage to the
transformer,there is no induced EMF in the primary &
secondary wdg.(except during switching period, both ON&
OFF).so,the transformer will draw high current from the
supply which detoriate the winding insulation & cause
transformer to burn.But actually this will not
happen .Becoz,the fuse will sacrifice itself to protect
transformer from high current.

Answer / sajid

During the time of switching flux links with primary and secondary of the Transformer voltage induced in primary and secondary after that no voltage induced in primary and secondary. Transformer primary take a large current due to the no back emf. This will damage the transformer Primary and later on secondary
Note - If any Correction please send email
msajid1980yahoo.com

Answer / ramineni lakshmi narayana

according to FLEMI change in flux causes EMF induced in the
conductor.
so when we give a.c change in flux happence, so EMF is
induced in the conductor.
if we give dc[constant flux],so emf induced is zero.
and winding acts as load and dissipates power in the form
of heat and due to over heat winding burns.

Answer / sonam

for the first time when u give DC to transformer u will get some volt at the o/p for few seconds, after that no volt is transferred to secondary as because of the explanation give above

Answer / darababu

When DC applied to transformer ,as the dc voltage is not time varying,it produces a constant flux in primary winding,which links only with primary causes primary to burn.

Answer / sakthivel

nothing will happen

Give two basic sprrd control scheme of DC shunt motor.

2 Answers  

how much power consumed by 1.5 ton capacity split A.C in 1 hour

2 Answers  

Why AC loads wont used in DC input supply? and Why DC loads wont used in AC input supply?

3 Answers   Bhel,

Which motor is 3.3 or 11kV more reliable, in terms of efficeancy,maintenance, reliability.

0 Answers   Megatron Solutions, TCL,

What should be distance required in between two phase of HT cionductors in open area??????

3 Answers  

how much current and power in watts can be carry by 2.5^2mm cu wire and 4 core 10^2mm Al cable?

1 Answers  

Why do you use an isolator on both sides of the circuit breaker? ( shortly answer)

2 Answers  

difference between ac and dc motor

1 Answers  

what is the meaning of harmonic in AC waves and when which are prduce and what is the effects on line and give any other information about harmonics

1 Answers  

In aerodynamic turbines which element is NOT there a.stator b.compressor c. Fuel intake system d.fans

0 Answers  

Why dont we get shock while testing for voltage with a line tester? How the bulb inside the tester glows while testing with tester coz we are totaly isolated from earth or we are not giving close path for the current to flow?

3 Answers  

Can I use less voltage cable for neutral, since the voltage of return path is zero ideally?

3 Answers   Vijai Electricals,