0
An electromagnet is that type of magnet that only acts like a magnet only when an electric current passes through it.
Under normal conditions, an electromagnet is not magnetic, but when current is passed through the electromagnet, it turns into a strong magnet. Magnet fields are generated when electricity is passed through the electromagnet.
This property can be used to selectively make a material magnetic and non magnetic.
Add your answer:
Earn +20 pts
What does an eletromagnet do in a motor?
Provide amoving magnetic force field.
What is The difference between a bar Magnet and an eletromagnet?
An electromagnet is a device produces a magnetic field from a moving electric charge. _____________________________________________________________________ All magnets are made from currents or moving charges. In a bar magnet the currents are the electrons in orbit around their nucleous. In most materials the atomic currents are oriented at random so their individual magnetic fields cancel each other out. In a bar magnet the atomic currents are all lined up so each of the atomic magnetics add up to give one large magnet. The atomic currents can be lined up, in some materials (like iron), with an electro magnet. <P>Electromagnets make use of the fact that a current in a wire (copper or aluminum wire works fine) wire will also create a magnetic field. It is found that if you coil the wire in the shape of a spring, the ends of the coil behave just like the poles of a bar magnet. The problem is its pretty weak unless the current is very large. But if you wrap the coil around a piece of iron, the coil's magnetic field will align the atoms in the iron so the atomic magnets add to the coil's magnetism and you end up with a very strong magnet.
Who invented the first eletromagnet?
Ugliness
How does an eletromagnet work?
The eletromagnet works by the energy flowing through the wire wrapped around the iron rod that causes the magnetic field
What does an eletromagnet do in a motor?
Provide amoving magnetic force field.
What will increase the strength of an eletromagnet?
Increasing the number of coils in wire
What two things are 0.5 inches?
a oreo cookie and a small eletromagnet
What is better for lifting heavy metal objects eletromagnet or permanet magnet?
permanet object
Is a electromagnet with a six volt lantern battery really powerful or not?
Is a eletromagnet with a six volt lantern battery really powerful or not?
Does a magnetic field strengthen on weekend as you move away from the eletromagnet?
The magnetic field becomes weaker as you move away from the electromagnetic source.
What is a eletromagnet produced by?
I believe that it's spelled electromagnet. An electromagnet is produced by electricity flowing through a wire wrapped around a needle 30 or more times.
The polarity of an eletromagnet is determined by the?
the way in which the positive & negative terminals on the battery or power supply are attached to the electromagnet. switching the leads from the positive terminal to the negative one, and the negative one to the positive terminal should reverse the polarity of your electromagnet.
What do you need to make an eletromagnet?
Electromagnets require little more than a power source and a conductive substance, producing an electromagnetic field. Insulated copper wire, a battery, and an iron nail can be used to make an electromagnet at home, but industrial electromagnets work on much larger scales.
How big is an eletromagnet?
An electromagnet can be any size from a few millimetres (magnetic tape or computer hard disc read/write heads) to several metres (industrial uses such as scrap yards for lifting steel, or research such as parts in particle accelerators and fusion reactors). The only limit to the upper size would be available materials and manufacturing technology.
