Answer / satish mankar

if,x'mer works in d.c supply,then flux is constant,no e.m.f
is produced,if back e.m.f does not produced the ckt will
draw a more current and causes heating of the winding and
x;mer will damage

Answer / aman jangra

transformer not working in d.c because the muatual induction
zero due to no frequency present in d.c as compare to ac
voltage.and no induction in primary winding ...and then
transformer not working.

Answer / masna awan

because d.c has zero frequency. so no flux produce in
primary coil and low resistance pass high current and
primary coil will burn.

Answer / bhavsar.malay

because of this two reasons..
1)transformer works on principle of electromagnetic
induction...
hense,there is no change in the voltage source with respect
to time so, there won't be induced of emf in either of the
coil...
and so there won't any output appearing on the secondary..
EFFICIENCY=0
2)if the DC suppluy is given the there may be POSSIBILITY
OF THE SATURATION OF CORE MATERIAL WHICH MAY CAUSE DAMAGE
TO TRANSFORMER...
hence for dc supply transformer can not work,
and for just testing purpose only dc supply is given up to
certain ranges..

Answer / cd

love the transformer no given the dc supplu

Answer / minal

Since dc has both potential(ie +ve & -ve)so if it passed
through primary of the transformer then its windings get
burned.That is why transformer doesnot work on dc.

Explain what cmos is and its benefits?

0 Answers  

We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?

0 Answers  

wat do knw aboot circuit breakers ?

9 Answers   IOCL,

In case of delta/delta transformer if the one phase is blown out then what will be secondary line voltage ?

4 Answers  

Am i eligible to get electrical supervisor licence? As i did diploma as well as degree in Electrical Engg. in June 2011. Now i am working in 15 MW Power plant from 2 mnths. i belongs to Maharashtra.

1 Answers  

why we use end termination xlpe cable on ht kit

1 Answers   Al Bario,

What happen if LV supply is fed to a HT motor?

19 Answers   ITC Infotech, Jindal,

How to calculate motor current for 3 ph & 1 Ph motor from KW rating?

3 Answers  

how to calculate energy of 3-phase motor?

0 Answers   Suzlon,

How many watts required for single phase power supply?

4 Answers  

which type motor r use in the celling fan.....

6 Answers  

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

0 Answers