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A transformer doesn' t work with DC current because voltage is induced in the output winding of the transformer when a magnetic field passes through the coils of this winding. This happens with AC current because the magnetic field is continually expanding and contracting. With a DC current the magnetic field is unchanging other than when you first turn it on. Since the magnetic field is not moving it is not moving through the windings and no voltage is produced.
What else can I help you with?
Why don't we supply to DC to the transformer?
When we give d.c supply to a transformer the primary winding will burn because constent flux will be will be produced which doesnt link with secondary so max current will circulate on primary winding only
How a transformer is very useful in ac supply?
Transformer is the only device which is capable to stepup or stepdown an ac signal. That's why its used widely in ac supply.
What is the difference between control transformer and Potential transformer?
Control transformer used only for control supply 110,220, 24,12V AC. But Potential transformer used voltage measurement purpose.
Where is the transformer DVD available in India?
only if you have an allspark. A little known fact is that it doesnt actually exist.
Can you use transformer for DC supply?
No. Only Transformer could not be used for DC supply.If yoy need to have DC out put,then rectifier unit required .
Why does a transformer only work for AC supply and not DC supply?
A transformer makes and collapses a magnetic Field inside 60 times a second for home power in North America, 50 times a second in Europe. The building and collapsing of a magnetic field "Induces" a voltage in another transformer winding. DC current only creates a stable magnetic field and this will not create or induce voltage in the other winding. Normally covered in grade 5 science where I live.
Can a 500mA transformer be used to operate a circuit requiring 1amp12w?
No because that transformer can only supply a ½ amp so it would seriously overheat if a 1-amp load was connected to it.
How does auto transformer work with DC supply?
Transformers don't work with DC supplies - they only work on AC.
Will you suffer from a shock attack when you connect a dc source to a transformer?
Not necessarily -only if you come into contact with the source voltage. But it won't do the transformer any good, as they only work on a.c. Attach a d.c. supply at its rated voltage, and you'd likely burn out the transformer's primary winding,
In D.C supply the transformer is not connected why?
In a DC power supply a transformer is connected. The only time there would be no transformer used would be if the DC voltage wanted was 120 VDC. The transformer in the power supply is connected to 120 VAC on the primary side and the secondary side of the transformer is connected to either a half wave or a full wave diode bridge. The voltage out of the diode bridge will be the same output voltage potential as the transformer's secondary voltage but it will be a DC (Direct Current) potential.Reading the question in another way, transformers are not connected in a DC circuit. The reason being is that the transformer operates on a collapsing magnetic field. This field induces a voltage into the secondary side of the transformer. Since the DC circuit does not operate on the principle of a collapsing field except when the circuit is opened, the transformer would not operate as a transformer should..
How can you step down a 15kv transformer single phase to 220v?
A transformer steps the voltage of an electrical power supply up or down. The transformer must be correctly designed for the voltage and current levels that it is intended for. Only ac can be used with a transformer, which is designed to work at a particular frequency.
What happens to the overall amount of energy transmitted by a transformer?
Part of the energy is lost in heat by processes in the transformer. That is usually only 1-2% for power supply transformers. The remainder is passed on to the load.
