The advantages of Electromagnetic Induction are: AC or DC electrical power can be generated using Electromagnetic energy source. Eliminates the need of an external electrical source to generate electrical power.

electric generator

Electromagnetic Induction or Induction is a process in which a conductor is put in a particular position and magnetic field keeps varying or magnetic field is stationary and a conductor is moving. This produces a Voltage or EMF (Electromotive Force) across the electrical conductor.

Electromagnetic induction is when a voltage is created by passing a conductor through a magnetic field….The size of the voltage can be varied by three factors:

• The size of the magnetic field.
• The active length of the conductor.
• The speed at which the conductor passes through the field.

Electromagnetic induction is the process of generating electric current with a magnetic field. It occurs whenever a magnetic field and an electric conductor move relative to one another so the conductor crosses lines of force in the magnetic field.

Bitter electromagnets have been used to achieve the strongest continuous manmade magnetic fields on earth―up to 45 teslas, as of 2011.

The world’s most powerful magnet was built in the United States in 2011 in a University Center in Florida. This super magnet has a magnetic field of 44.14 Teslas, and we can say that it is 900 thousand times that of the earth and more than 9 times that of a closed resonance equipment that we find in a hospital.

Easy On/Off. Besides their strength, another pro of electromagnets is the ability to control them by controlling the electric current. Turning the current on or off turns the magnetic field on or off. The amount of current flowing through the coil can also be changed to control the strength of the electromagnet.

General Atomics Fabricates the World’s Largest Superconducting Electromagnet.

This is the Smallest Electromagnet….Smallest Electromagnet.

In a sense, yes. The crust of the Earth has some permanent magnetization, and the Earth’s core generates its own magnetic field, sustaining the main part of the field we measure at the surface. So we could say that the Earth is, therefore, a “magnet.”

You can make an electromagnet stronger by doing these things:

1. wrapping the coil around a piece of iron (such as an iron nail)
2. adding more turns to the coil.
3. increasing the current flowing through the coil.

Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.

Some everyday devices that have electromagnets inside them include: Microphones, speakers, headphones, telephones and loudspeakers. Electric motors and generators. Doorbells and electric buzzers.

If you disconnect the wire, the magnetic field disappears and the nail is no longer a magnet. If you leave the wire connected long enough, the nail’s magnetic domains will realign enough to make it a permanent magnet.

The electromagnet becomes a permanent magnet. …

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 center of the coil.

By simply wrapping wire that has an electrical current running through it around a nail, you can make an electromagnet. When the electric current moves through a wire, it makes a magnetic field. If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak.

Can you make electricity from magnets? Yep, just as we can make magnets from electricity, we can also use magnets to make electricity. If you move a magnet quickly through a coil of copper wire, the electrons will move – this produces electricity.

Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.

electromagnet

Can neodymium magnets be turned on and off? Generally, no. It’s also opposite of a “temporary” magnet, like when you stick a (permanent) magnet to a steel paperclip, and that steel acts like a magnet as long as the (permanent) magnet is stuck to it. Remove the magnet, and the paperclip stops acting so magnet-like.

There are permanent magnets that CAN be “turned on and off” using a lever. They are used in machine shops. They work by connecting the magnetic fields to pole pieces or shunting the magnetic field away from the pole pieces, which are flat surfaces with two or more “conductor” strips and non-metallic spacers.

All magnets can be demagnetized, and there are multiple ways to do that. Temporary magnets are items that are magnetic but do not keep their field as strongly. One of these methods requires increasing the temperature of the magnet. Another way to make a magnet lose its magnetic field is by hitting it.

Demagnetization processes include heating past the Curie point, applying a strong magnetic field, applying alternating current, or hammering the metal. Demagnetization occurs naturally over time.

As the temperature increases, at a certain point called the Curie temperature, a magnet will lose its strength completely. Not only will a material lose its magnetism, it will no longer be attracted to magnets.

To date, no one has ever found a magnetic monopole in nature – we’ve never found a magnet that is truly north or truly south. “While we can find electric monopoles in the form of charged particles, we have never observed magnetic monopoles.”

A magnetic monopole does not exist. Just as the two faces of a current loop cannot be physically separated, magnetic North pole and the South pole can never be separated even on breaking a magnet to its atomic size. A magnetic field is produced by an electric field and not by a monopole.

Two types of permanent magnet therapy are popular: unipolar and bipolar. The terms unipolar and bipolar refer to the magnetic poles facing the patient’s skin. Unipolar magnet therapy usually uses several discrete, individual magnets aligned with the same magnetic pole toward the skin.

north pole