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An electric current flowing in a wire creates a magnetic field around the wire. To concentrate the magnetic field of a wire, in an electromagnet the wire is wound into a coil, with many turns of wire lying side by side. The magnetic field of all the turns of wire passes through the center of the coil, creating a strong magnetic field there. A coil forming the shape of a straight tube (a helix) is called a solenoid; a solenoid that is bent into a donut shape so that the ends meet is called a toroid. Much stronger magnetic fields can be produced if a "core" of ferromagnetic material, such as soft iron, is placed inside the coil. The ferromagnetic core magnifies the magnetic field to thousands of times the strength of the field of the coil alone. This is called a iron-core electromagnet.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoStudy Island....Starts off with "charged and insulated wire wrapped around a piece of iron."
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Electromagnets are different then homemade electromagnets. How?
Industrial Electromagnets Use higher quality metals for the coil winding. Also the windings are of different design and there are more of them. The metals used for the conductor are also of better quality material and have greater voltage sent to them.
When are electromagnets used to increase or decrease the voltage of electric currents?
Electromagnets are never used to increase or decrease the voltage in a circuit. These magnets in conjunction with a rotating device (an armature) can create a voltage but the do not have any effect on a voltage.
Which country is using the abacus?
"Answer"The abacus was created 3000Bc ago by the chinese.
Are there electromagnets in cars?
Alternators, HVAC blower motors, power windows, EGR valves (if not vacuum operated) and well I'll think of more
Is The Simpsons cell-based animation?
No. Since Season 13, The Simpsons is no longer created frame by frame using celluloid.
What is one advantage of using electromagnets instead of permanent magnets?
Electromagnets can be turned off and off
An advantage to using electromagnets is that they?
Can be turned on and off.
How do you use a sentence about electromagnets with an iron bar and copper coil?
The student tested his theory using electromagnets, an iron bar, and a piece of copper coil.
Which of the following statement about electromagnets is true?
Electromagnets are temporary magnets that are created when electric current flows through a wire coil. The strength of an electromagnet can be increased by increasing the number of turns in the wire coil, increasing the current flowing through the coil, or by using a ferromagnetic core material.
Can increase the strength of an electromagnets field by?
using a stronger ferromagnetic material for the core. :)
What are some of the uses of magnets and electromagnets in our daily life?
like using laptop
How are electromagnets used in auto mobiles?
the main example is the alternator. using electromagnets to create electricity for the creating of spark in the chamber, and all those niceties inside and outside your car.
What is the flow of electromagnets called?
Electromagnets
Do electromagnets affect glue?
Electromagnets do not affect glue.
How are electromagnets different from magnets?
You can turn electromagnets on and off.
How can you create motion using electricity?
Motion is most often created from electricity by the use of a motor, or magnetic action. Within an electric motor a series of magnets or electromagnets are energized to allow the fundamental parts to spin on an axis.
Do food processors have electromagnets?
Yes, food processors do have electromagnets.
