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Why can't a DC electrical source connected to the input of a transformer induce the electrical flow from the transformer's output?
A transformer or generator works by changing magnetism into electricity when a magnet is turned on and off. You can move the magnets or you can create a break in the wire or use a switch or you can use alternating current. You need a way to turn the magnet on and off to change magnetic lines of force into electricity. So, to make your DC source work with your transformer, you must have a way to turn it on and off. Automobiles use a transistor to make the DC current from the Battery turn on and off so they can run it through a coil and have high voltage through the spark plugs.
What else can I help you with?
Why the transformer is not working in DC supply?
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
Will transformer operate if a battery is used for the input voltage across the primary?
Transformers only work on a.c. This is because it's necessary to have a changing primary current in order to induce a voltage into the secondary winding.If you connect a battery across a transformer, it will not work. Furthermore, if the voltage of the battery matches that of the rated primary voltage, the resulting very large d.c. current is likely to overheat the primary windings and even burn it out.
How does a step up transformer work on a three phase system?
A step up transformer takes a specific input voltage on the primary coil and induces a specific higher voltage on the secondary coil, hence the name step-up. The secondary voltage is determined by the ratio of turns on the secondary to primary coils respectively. For example, a transformer with 100 turns on the primary and 1000 turns on the secondary will produce a secondary voltage that is 10 times the primary voltage. For a more in depth explanation of how transformers actually induce voltage on the secondary coil, see the link below. You will most likely see a 'step-up' transformer on neon signs. The next time you're at a restaurant or bar, look at their neon sign. You'll see a black box (4" x 4" x 6"w) connected to the sign (usually). This is the transformer, and it takes 120 volts AC and steps it up to 7500 to 10,000 volts AC. This excites the neon gas and causes it to glow. A step-up transformer transforms voltage to a higher level. Like 120 volts to 277 volts. It is type of transformer which is used to step up the voltage from low to high value in order to make it applicable for high rated appliances. Not only for high rated appliances but also for transmission in power distribution systems. It is critical in this role. Power distribution systems depend heavily on step-up transformers to generate the high voltages needed for more efficient long-distance power distribution. (And yes, there are step-down transformers at the other end to make the voltages more "user friendly" and less dangerous.)
How does an auxiliary transformer work?
Auxiliary transformer- current transformer The current transformer is working based on two theories. 1.Ampheres law. 2.Faradays law. Amp.law- whenever a current flows through the conductor it will produce magnetic flux around the conductor. based on above principle- current flows through the primary will induce a magnetic flux in the CT core. Faraday law- whenever a conductor cuts the magnetic flux or magnetic flux cuts the conductor will induce a emf across the conductor based on above principle- the magnetic flux in the core will cuts the windings. so emf is induced across the secondary terminals . whenever the secondary terminals connected with burden will make a closed path and current flows through the secondary to burden.
How emf induce while apply in primary side of the transformer?
when an alternating current apply on primary side of transformer then magnetic flux produced in the iron core of transformer.Then flux link with secondary winding of transformer so that an emf produced in a transformer.
What can induce an electrical current in a wire?
An electrical current can be induced in a wire by a changing magnetic field passing through the conductor. This phenomenon is known as electromagnetic induction, and it is the basis for the operation of generators and transformers. Moving the wire through a magnetic field or changing the magnetic field around the wire can result in the generation of an electrical current.
What does a step up transformer do to increase the voltage of an electrical current?
A step-up transformer increases the voltage of an electrical current by having more turns in the secondary coil than in the primary coil. This causes the magnetic field to induce a higher voltage in the secondary coil, resulting in an increase in voltage.
Why should a transformer not be used on direct current?
Think of a transformer as a foot pump. Putting pressure on it will cause it to pump air but you need to release the pressure to do it again. The transformer does the same for electricity, if DC is applied to it it will create one pulse of current from the output but that is all. You need the continues rise and fall of AC to work the pump.
Can a constant dc current can induce a steady state voltage in a transformer?
No, the current has to change for a voltage to be induced in the transformer.
Can a magnetic field induce voltage in another nearby conductor?
A: Believe it or not that what a transformer does
What device permits electrical energy to be transferred from one AC to another without direct connection between them?
An electric transformer is the device that allows electrical energy to be transferred between two AC circuits without a direct electrical connection. This is achieved through electromagnetic induction, where changing currents in one coil induce a voltage in another coil.
Why DC cannot be stepped down?
DC cannot be easily stepped down using a transformer like AC because transformers work on the principle of electromagnetic induction, which requires a changing magnetic field to induce a current in the secondary coil. Since DC has a constant magnetic field, it cannot induce a current in the secondary coil of a transformer. However, DC can be stepped down using other methods such as voltage divider circuits or chopper circuits.
Can a constant dc current induce a steady state voltage in a transformer?
No. A constant DC current of sufficient magnitude induces smoke in a transformer.
What is eddy current loss in transformers?
Eddy current loss in Transformers is because of the eddy currents formed in the body of the magnetic core.Whenever a conductor(iron core) exposed to a changing magnetic field a magnetc field produced in the body of the magnetic core.That induce a circulating current in it.Which is called eddy current.In the case transformer it is loss.But it is useful in other purposes.
State the important difference between a transformer and induction motor?
A transformer uses a varying magnetic field to induce a voltage in another winding, often changing the voltage to match the requirements of the load.A motor uses a varying magnetic field in induce a torque in the armature, making it turn, converting electrical energy into mechanical energy. In the case of an induction motor, the "windings" in the armature are built in as "single turn shorted secondary windings", rather than windings connected via slip rings or commutators, but the end result is the same - opposing and attracting magnetic fields cause the armature to rotate.
What does a changing magnetic field induce?
An electrical current.
Why the transformer is not working in DC supply?
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
