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Electromagnet
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∙ 12y ago
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How many paperclips can a bar magnet pick up?
Depending on how strong the magnet is the amount of paper clips it can pick up will vary. Why don't you test it for yourself?
Why is it difficult to get an accurate bearing with a magnetic compass near the poles?
It can vary but i will give one reason. You might be near a magnetic metal which will interfere with what you are are trying to do, iron for example or steel so stay away from magnetic metals.
What type of metal can repel a magnet?
All metals can repel a magnet. The degree to which they do so is dependent on whether they are ferromagnetic, paramagnetic, or diamagnetic.A ferromagnetic metal is one which has a magnetic field regardless of whether or not they are subjected to an applied or external magnetic field. These are often called permanent magnets. The strength of their magnetic field varies depending on the strength of the external magnetic field, but has a limit outside of the external field. Iron is an example of a ferromagnetic metal.A paramagnetic metal is one which has a magnetic field only when subjected to an applied or external magnetic field. The strength of a paramagnetic metal's magnetic field tends to vary proportionally with the external magnetic field, and so these are often the strongest magnets that we see. An electromagnet is the easiest way to conceptualize the way a paramagnetic metal works. When an electromagnetic circuit is turned on, it's a magnet, when it's turned off, it's not. Tungsten is an example of a paramagnetic metal.Diamagnetism is a property of all materials, not just metals. This property is kind of hard to explain classically, so just think of it as a material's magnetic field created, when subjected to an external magnetic field, because of all of the material's electrons being pulled one way, and all of the material's protons being pushed the other way. The strength of a magnetic field from a purely diamagnetic material is farweaker than that of a paramagnetic or ferromagnetic material's magnetic field.
What is specific gravity of rocks?
It would vary widely depending on the kind of rock and chemical composition, of course.
What is a Geophysicists annual salaries?
The average salary of a geophysicist is 100,000 dollars in the United States. This amount will vary depending on what kind of experience they have and how long they have been working in that field.
What kind of magnet can vary its strength polarity?
an electromagnet
What type of magnet can vary its strength and polarity?
electromagnet
How can the strength of a scrap heap magnet vary?
The strength of a scrap heap magnet vary depending on the strength of the current or number of "turns" in its primary coil. Increasing either or both of these makes the magnet stronger.
How many iron nails can be lifted by the magnets?
That will vary inversely with the size/weight of the nails and directly with the strength of the magnet.
How do you calculate the magnetic dipole moment of a bar magnet?
The strength of a magnet can be determined by measuring its flux density (B) which is expressed in teslas. The flux density will vary according to where relative to the magnet it is being measured. The instrument for doing this is a flux-density meter (which was called a 'gaussmeter' - 'gauss' being an obsolete unit of measurement for flux density, from the cgsA metric system).
If you bring a bar magnet close to the first iron nail can the first iron nail attract and lift a second nail?
What happens if vary/change the distance between the magnet and the nail/s?
What happen if vary change the distance between the magnet and the nails?
the closer the magnet is to the nails the greater the magnetic force between the magnet and the nails
How you do Speed control of permanent magnet synchronous motor?
To vary the speed of a permanent magnet synchronous motor, you need to vary the frequency of the AC power source. Of course, this also means you need to vary the voltage because the power factor is going to change, and you need to compensate for that or you might damage the motor.
How many paperclips can a bar magnet pick up?
Depending on how strong the magnet is the amount of paper clips it can pick up will vary. Why don't you test it for yourself?
Is alkali strong or weak?
Alkalis, bases, vary in strength as do acids
What is the tensile strength of plastic?
There are multitudes of plastics, and they vary widely in their mechanical properties. It is not possible to assign a tensile strength to "plastic" as there are so many.
If you were to mechanically rotate the armature in an electric motor what would happen?
You said "armature" so it is a dc motor. Hence if the field is permanent magnet type then a voltage appears at the armature terminals nd its magnitude depends on the speed nd magnetic field strength. If it's field coils, then they must be seperately excited (if it don't possess residual). By changing the field strength you can vary the voltage produced at armature terminals.
