What would you like to do?
What does the electromagnet in the telephone do?
It speed up the communication. It created a new channel for long distance communication, instead of letters which requires long time to deliver and may become lost.
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 cur…rent 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. The magnetic field produced by an electric current forms circles around the electric current.
A telephone is another name for a 'phone' or a 'mobile' or even a 'cell', which are all slang terms for the telephone. A telephone is a communication device used between two… people in two different locations (anywhere in the world now - thanks to satelite phones). It is used for two people to talk to each other.
Tele- means far -phone means voice so telephone means 'distant voice'
Any conductor carrying an electric current induces a magnetic field. If the conductor is wrapped around an iron core, the magnetic field produced can be used for many uses. …Most people have seen scrap-yard magnets used for picking up iron and steel scrap. Electromagnets are also used as electrical relays, speakers, mechanical movements, and metal separators in industry. There are thousands of other uses for this very useful device. A simple electromagnet is constructed by winding a wire around a cylinder (e.g., empty thread spool) and attaching the ends of the wire to the poles (+ and -) of a battery. An electromagnet is a coil of wire wrapped around a metal core several times. The individual magnetic fields of the individual wires reinforce and strengthen to form one large magnetic field.
Electromagnetic waves are the mechanism by which electromagnetic energy (electromagnetic radiation) moves. They are composed of two components: an electric wave, or an electri…c field, and a magnetic wave or magnetic field. The fields are in dynamic motion, and these two waves are in phase and move at 90 degrees to each other. The orientation of this "package" can vary in the space through which it moves, which leads to what we term polarization, but the electric and magnetic components always maintain the right angle relationship to each other. Draw an "X" with the angles it creates equal to 90 degrees. Got it? A cross? Now rotate it just a bit. The whole thing. Now a bit more. Now a bit more. You are looking at the electromagnetic wave as it's coming at you (or going away), and you're changing the polarization of the cross without changing the cross itself. Let's jump. One of the four basic forces in the universe is the electromagnetic force. Not the electric force, not the magnetic force, but the electromagnetic force. You can't have one without the other. Ever. A magnetic field is always created by some sort of charge movement. It is the only way a magnetic field can be created. Just like you can't have gravity without mass, you can't have magnetism without some sort of charge movement. Any time a charge moves, a magnetic field is created. All the time. Every time. No exceptions. Let's jump to go a step further. Let's take a simplified example. Picture a pond as smooth as glass. We walk out on a low dock and kneel down at the water. Then we take our index finger and just "tap" the surface of the water one time. A ripple is generated, and it moves out away from the point where we initiated it. We good? Let's bounce a bit. If we take a charged particle like, say, an electron that is in orbit around an atom, and we give it some energy to kick it out to the next higher orbital; we have ionized the atom. The electron will then "dump" that extra energy and return to its original orbital. That energy it dumps will take the form of a "particle" or "package" of energy - a quantum of energy. And it is a moving electric and a complimentary moving magnetic field - just like the ripple on the pond. Only it is this "coupled" electric and magnetic "bundle" of energy. It's a photon, or a quantum of electromagnetic energy. The energy of the wave is carried in the moving fields, and that is why the wave does not require a medium through which to travel. In fact, anything other than a vacuum will attenuate or "suck energy" out of the wave a bit at a time through the distance through which the wave travels in that medium. As you might have guessed, electromagnetic radiation comes in different "amounts" or amplitudes, and in different frequencies (energies). From radio waves through microwaves, and through infrared light, visible light, ultraviolet light and X-rays all the way to gamma rays, there is a full spectrum of this energy. This gets deep, but the essence of what is happening is here. Simple, but subtle and elegant. Reachable by even elementary school investigators. It is the essential nature of the universe we live in. Wikipedia has more information, and a link is provided below to their post on electromagnetic radiation. Further investigation is encouraged. At least surf on over and look at the drawing of the moving and electric and magnetic fields to lock that in. Maybe skim the article while you're there, or at least bookmark it. You've just peeked through the window in the quantum mechanical universe. Enjoy the view. Wonder at it. It is the reality in which we live.
To make a small electromagnet all you need is an iron nail and some fine isolated wire. Wind a couple of feet of the wire around the nail then connect one side of the wi…re to the positive side of the battery and the other to the negative. At the moment they are connected to the battery the nail is a magnet and as soon as the power comes of it will have lost most of its magnetism. Just an ordinary torch battery will do.
because he wanted to figure out a way to talk to someone in another room
Electromagnetism is the "effect" of the electromagnetic force, which is one of the four fundamental forces in the universe. Electromagnetism speaks to electric fields and the …relationship between magnetic fields and moving electric fields. Electromagnetism is the force that causes the interaction between electrically charged particles, and is responsible for practically all the phenomena observed in daily life, except gravity. Electricity and magnetism are the two obvious examples. The chemical bonds holding molecules together are electromagnetic. Light is electromagnetic radiation. The light need not be visible light. Heat, infrared radiation, UV (ultraviolet radiation), gamma rays, microwaves, radio waves--all of these are examples of light. The photon is the gauge boson which mediates the electromagnetic force. Refer to the link below to read more about the electromagnetic force. Magnetism induced on a ferric material form the alignment of electrons caused by a electric field.
It is the ability of the atom in covalent molecule to attract the electrons of the bond towards itself.
An electromagnet is a magnet carrying an electric current. This can be useful for many things. eg, door bells.
It lets you call people all over the world if you have there phone number.
An electromagnet converts electric current into a magnetic field. They are useful when the magnet should be able to be controlled, rather than a permanent magnet.
Telephones are used to transfer audio tones over copper wire. Giving us the capabilities to communicate especially in long distances. With the telephone cabling system we are… able to get connected to the internet. voice communication between two persons
It is used for the soundwaves that come out of the ear piece :)