what's an electromagnet

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Questions and Answers - What is an electromagnet...

An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity. An electromagnet works because an electric current produces a magnetic field.

Electromagnet - Wikipedi...

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.Electromagnets usually consist of wire wound into a coil.A current through the wire creates a magnetic field which is concentrated in the hole, denoting the centre of the coil.

What is Electromagnet - The Engineering Project...

The electromagnets are frequently used in all classes of electrical machines like motor, generator, speaker and magnetic imaging machine in the hospital. Lines of Force around an Electromagnet. When the current passes through the wire it behaves like an electromagnet due to this current magnetic field is produced around the conductor.

What is Electromagnetism? - Science for Kids | Mocom...

An electromagnet is a magnet whose magnetic field is created when electricity is flowing. This type of magnet is different from the refrigerator magnets that you use to decorate your refrigerator. A refrigerator magnet is a kind of permanent magnet made of magnetic material that continuously generates a magnetic field.

Two Advantages of an Electromagnet Over a Permanent Magnet .....

Magnets come in two main types: permanent magnets and electromagnets. As its name suggests, a permanent magnet is always magnetized -- think of a kitchen magnet that stays stuck to a refrigerator door for years. An electromagnet is different; its magnetism works only when powered by electricity.

How Electromagnets Work | HowStuffWork...

Electromagnets are useful because you can turn the magnet on and off by completing or interrupting the circuit, respectively. Advertisement Before we go too much farther, we should discuss how electromagnets differ from your run-of-the-mill "permanent" magnets , like the ones holding your Popsicle art to the fridge.

How to build a Large electromagnet? | Physics Forum...

Considering that you can buy an electromagnet that lifts 500 pounds and runs on 2 'D' cells, I don't really think that it's a problem. Just make sure that your windings are tight and uniform. I don't know if number of layers vs total turns makes any difference. ie: Is short and fat better than, worse than, or equal to long and skinny?

What is an Electromagnet? (with pictures) - wiseGEE...

An electromagnet works on the principle that an electric current not only allows electrons to flow in a circuit, but also generates a small magnetic field.When a wire carrying electricity is coiled, the magnetic field becomes even stronger.

How Electromagnets Work | HowStuffWork...

Electromagnets are useful because you can turn the magnet on and off by completing or interrupting the circuit, respectively. Advertisement Before we go too much farther, we should discuss how electromagnets differ from your run-of-the-mill "permanent" magnets , like the ones holding your Popsicle art to the fridge.

What is the difference between electromagnet and solenoid...

A solenoid is an electromagnet but an electromagnet needn't necessarily be a solenoid. A wire carrying electric current is an electromagnet. In fact, the very first electromagnet was a horseshoe shaped. So a suitable definition of electromagnet would be, anything which produces a magnetic field around itself when a current passes

What Is an Electromagnetic Generator? (with pictures...

An electromagnetic generator is a device that transforms mechanical energy into electrical energy, using the interconnected principles of magnetism and electricity. The process by which an electromagnetic generator produces electricity is called electromagnetic induction, which basically means that an electric current is induced within a ...

Physics for Kids: Electromagnetism and Electric Motor...

Electromagnet When an electronic current flows through a wire, it generates a magnetic field. This is an important concept in electricity. The magnetic field can be increased by coiling the wire. This allows more current to flow through a smaller distance and increases the magnetic field. Right-Hand Rule

What is an Electromagnet? (with pictures) - wiseGEE...

An electromagnet works on the principle that an electric current not only allows electrons to flow in a circuit, but also generates a small magnetic field.When a wire carrying electricity is coiled, the magnetic field becomes even stronger.

Electromagnet Meaning | Best 5 Definitions of Electromagne...

What does electromagnet mean? A magnet consisting essentially of a coil of insulated wire wrapped around a steel or i...

The Good, the Bad and the Electromagnet - Activity .....

Using plastic straws, wire, batteries and iron nails, student teams build and test two versions of electromagnets—one with and one without an iron nail at its core. They test each magnet's ability pick up loose staples, which reveals the importance of an iron core to the magnet's strength. Students also learn about the prevalence and importance of electromagnets in their everyday lives.

Two Advantages of an Electromagnet Over a Permanent Magnet .....

Magnets come in two main types: permanent magnets and electromagnets. As its name suggests, a permanent magnet is always magnetized -- think of a kitchen magnet that stays stuck to a refrigerator door for years. An electromagnet is different; its magnetism works only when powered by electricity.

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