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This our padlet:)
It's created by: Isabel, Gabriel, Nuño, Xuan and Sofia
We hope you like it:)

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The four fundamental forces of nature, and is caused by the motion of charge . Two objects containing charge with the same direction of motion have a magnetic attraction force between them.

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Electricity and magnetism similarities  

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Electricity and magnetism similarities  

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Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field.

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The important thing to remember is that force is inversely proportional to distance squared (i.e. it obeys an inverse square law with distance).

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How is it possible for magnets to apply a force over a distance?

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How is it possible for magnets to apply a force over a distance?

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A magnet can exert force over a distance because the magnet is surrounded by a magnetic field.

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An electric current is the movement of particles that starts when an external voltage is applied to one end of a conductor.

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Electric current is used to transmit electrical energy through a circuit, for the purpose of operating electrical appliances.

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Who was the creator of the electric current?

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Who was the creator of the electric current?

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It was discovered by the English chemist and physicist Michael Faraday (1791 - 1867), when moving a magnet through a closed circuit of conducting wire generated an electric current.

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An electromotive force is needed to order the movement of electrons. The e.m.f. not only commands the electrons but also gives them the necessary force to circulate in the conductor.

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An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. . A current through the wire creates a magnetic field which is concentrated in the hole in the center of the coil.

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In 1825 William Sturgeon developed the first practical electromagnet by loosely winding a coil of un-insulated wire around a horseshoe-shaped piece of iron. To prevent the wire from shorting Sturgeon coated the iron in varnish.

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The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.

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1. Cranes use huge electromagnets to pick up scrap metal in junkyards.
2. Electromagnets use electricity to create their power of magnetism.
3. Powerful electromagnets are used in high-speed trains, called Maglev trains.

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They are formed when an electric field (Fig. 1 red arrows) couples with a magnetic field (Fig. 1 blue arrows). Both electricity and magnetism can be static (respectively, what holds a balloon to the wall or a refrigerator magnet to metal), but when they change or move together, they make waves.

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Using electricity we can create a magnetic field by forcing electrons to move in the same direction.

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Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail.

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When a conductor is placed in a magnetic field and current flows in the conductor, the magnetic field and the current interact each other to produce force. The force is called "Electromagnetic force".

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They are present in everyday life: the microphone, the speakerphone, the microwave oven, the doorbell, electric car, smatphone, PCs, washing machine, TV, watch....

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The doorbell.
The doorbell generates a sound
when a button is pressed. It works through an electromagnet that receives the electricity, so it generates a magnetic field (a magnet effect) that attracts a small hammer that impacts against the bell and emits a sound.

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The electrical engine.
It is a device that converts electrical energy into mechanical energy. The electrical energy produces magnetism, in the way it moves the axis of engine producing movement.

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The microwave oven.
It is an electric oven that generates electromagnetic radiation at microwave frequency. These radiations vibrate the water molecules of the food, which produces heat quickly, cooking it.

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Thanks for listening:)