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What else can I help you with?
What ways can you magnetise an object?
The easiest is to align the object with the earth's magnetic field and pound on it with a hammer, but this is slow. Another is to rub one pole of a magnet repeatedly in the same direction along it. The fastest is to place it inside an electromagnet solenoid and power the electromagnet from a DC power source.
How can a simple electromagnet be made?
first, you have to have a ferromagnetic core, like an iron bolt. then, you wind a magnetic wire around it. the thicker the winding, the stronger the magnet. the tips of the wire should be protruding so you can connect it to a source. skin the tips of the wire, too. connect the wire to a dc source and you got an electromagnet.
How do motors that do NOT use magnets work?
Motors that do not have magnets work exactly the same. The permanent magnet is replaced by a electromagnet, which is a coil of wire with a voltage applied to it. This electromagnet is what produces the magnet field necessary for a motor to operate. It is just easier and lighter to use this style of DC motor in larger applications.
Do you have to connect a cell to work an electromagnet?
A cell or other (DC) power source must, indeed, be connected to an electromagnet to make it work. It is an electromagnet. Surf the link to our friends at Wikipedia. It's a good article, and the pics are cool.
If Transformer on a DC circuit?
Trsansformers work on mutual induction principle caused by the changing magnetic field. Since there is no changing magnetic field i.e there is no "+" and "-" cycle in DC source supply so transformer cant work on a DC source. Its core will become permanent magnet.
Can you run a 24 volt dc motor with 24 volt ac power?
Not usually. But this depends on how the motor is made. So a permanent magnet motor is usually a d.c. Motor. It's something to do as with the wires in the motor, the electromagnet-outer fields are wound.
A coil that is magnetized only when an electric current flows through it?
The coil you are describing is an electromagnet. When an electric current flows through the coil, it creates a magnetic field around it. This magnetic field magnetizes the coil, allowing it to attract or repel other magnetic materials.
To make an electricity magnet is the current electrical or battery?
Either AC or DC will do it, but usually a DC source (battery or rectified AC) is preferable, as the North and South poles won't keep changing ends
Will exposing a magnet to a DC magnetic field demagnetize it?
Exposing a magnet to a DC magnetic field typically won't demagnetize it unless the field is very strong and exceeds the coercivity of the magnet. In most cases, a DC magnetic field won't affect the magnet's strength but can alter its orientation or alignment.
The rotating electromagnet coil assembly in a dc motor is called what?
it is called an armature
How can you turn a piece of iron into a magnet?
To turn a piece of iron into a temporary magnet, wind a coil of (insulated) copper wire around it and run a DC current through the wire. The iron will become the core an electromagnet -- the one you just constructed. As long as direct current flows through the coil, the iron core will attract ferromagnetic materials.jkghyjy Wrap many coils of lacquered copper wire round an iron nail. When electricity is sent through the coils, the nail becomes magnetised. The iron is an electromagnet as long as the power is on. When a piece of iron is brought near the magnet it also becomes a temporary magnet.
Why electromagnets over permanent magnets for a large dc machine?
The flux density of an electromagnet can be easily controlled. It's also easy and cheap to produce a large flux density with an electromagnet which is necessary for such large dc motors. Permanent magnets are generally expensive. For such a large motor,a very large permanent magnet will be needed for that motor which will not be ideal.AnswerElectromagnets are more powerful than temporary magnets, and -as pointed out above- their flux density can be controlled.
