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Electromagnets are used in things that have moving parts, eg. CD players, heads on Hard drives, automatic doors in a grocery store, electric windows, motors etc.,
Some examples include: You can slide the bolts of locks and latches, tap out telegraphic dots and dashes, open and close switches in distant electric circuits. The rotors of all electric motors are spun by electro-magnetism.
A relay is a device which uses a low current circuit to switch high current circuit on/off. A large relay system is used in cars for switching the starter motor, because it draws a very big current.
When the switch in the low current is closed it turns the electro magnet on, this attracts the iron rocker. The rocker pivots and closes the contacts in the high current circuit. When the low current switch is opened the electro-magnet stops pulling, the rocker returns and the high current circuit is broken again.
Electro-magnets have been used in hospitals to remove particles of metal ( those which are magnetic- because not all common metals are magnetic, e.g. aluminium, copper, brass, gold, silver), which may have lodged in people's eyes after an accident.
Some large cranes in scrapyards are electromagnetic. The electro-magnet is made up of a big coil of wire, with many turns and a soft iron core.
The crane lifts large pieces of metal when the current is switched on and drops its load when the current is switched off.
A circuit breaker, also called a resettable fuse is electro-magnetic. This is placed on the incoming live wire. If the current gets too high the magnetic field in the coil pulls the iron rocker which "trips" the switch and breaks the circuit. It can be reset manually but will always switch itself off if the current is too high.
quote from Zephyrus: Interactive Education on the web
http://www.zephyrus.co.uk/electromagnetsanswer.html
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoWhen you have alot of big s41t to move.
(that person gave a preeeetty bad answer yes? lol) when you have to move large heavy objects such as cars in a wrecking yard. the workers use a large electromagnet to move wrecked cars to different places. but i do suppose the first person is right... to an extent xD
Wiki User
∙ 14y agoelectromagnet device in which magnetism is produced by an electric current. Any electric current produces a magnetic field, but the field near an ordinary straight conductor is rarely strong enough to be of practical use. A strong field can be produced if an insulated wire is wrapped around a soft iron core and a current passed through the wire. The strength of the magnetic field produced by such an electromagnet depends on the number of coils of wire, the magnitude of the current, and the magnetic permeability of the core material; a strong field can be produced from a small current if a large number of turns of wire are used. Unlike the materials from which permanent magnets are made, the soft iron in the core of an electromagnet retains little of the magnetism induced in it by the current after the current has been turned off.
Electro-magnets are part of your automobile's electrical system as well. The starter motor uses electro-magnets as do all electric motors, the ignition coil is little more than specialized electro-magnets, the automatic door actuators are electro-magnets as are the injectors and any relays.
If your computer uses a hard-drive, electro-magnets are used to position the read/write head, to spin the disk and to write to the head. An electro magnet is also used to spin the motor of the cooling fan(s).
Wiki User
∙ 9y agoThere are many uses of the electromagnet, it is used to invent generators and electric motors, used it to control the switch relay, use in practical industries, and even in an electric bell etc. Because the electromagnet is a type of magnet in which the magnetic field is produced by the electric current.
Wiki User
∙ 12y agoUses of electromagnets are many.
1) Ordinary Door Bell
2) Audio speakers
3) Telephone
4) Relays
5) In computers
6) Lift heavy cars and deposit them into crushers for recycling
7) Many, many more
Wiki User
∙ 13y agoElectro-magnets are used because of their numerous advantages. First, it can be switched on and off. Second, the strength of the electromagnet can be controlled by the amount of current flowing in the wire. Third, reversing the current can reverse the poles of the magnet field.It is used in:-
- Motors and generators
- Transformers
- Electric bells
- Loudspeakers
- Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks
- Particle accelerators
- Magnetic locks
- Magnetic separation of material
- Industrial lifting magnets
Wiki User
∙ 13y agoto decorate your fridge , and stick up all those A+ papers :)
Wiki User
∙ 13y agoIn a junkyard to pick up cars and drop them in a different position or place
Wiki User
∙ 14y agoi use t.v magnets or clouds with clowns dancing on top
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What is paper used for today?
paper is used for writing on and can also be used for oragamy
When was science used or is being used to make decisions?
It's used when predicting the weather, learning about what happened on the earth before there were humans, its used in computers, its used to learn more about the human body. Science is used for A LOT!
Need used in sentence?
Who used up all the scotch tape? Will you buy a car that's new or used? She used a knife to slice the bread. He used to work at Mc Donalds, but he was fired. She's not used to driving such a big vehicle. He used that girl to make his wife jealous.
What is spearmint used for?
spearmint is some times used for toothpast and can even be used for eating
What is a submersible is used to .?
It is used to go underwater.
How do elctromagnets work in CD players?
I've already answered this qu.
Why don't you use steel for elctromagnets?
because steel keeps its magnetism for a bit when you switch off the current so it would still magnetize things.
How do attracting and repelling forces between magnets and elctromagnets make a motor turn?
The elctromagnet has a phase difference between it and the rotor magnet. The electromagnet leads the rotor and attracts one side and repels the opposite side. This torques makes the motor turn.
Is thalidomide used to treat cancer?
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When do you use are or is?
He is. She is. It is. They are. We are. You are. (I am).
What were Aboriginal tools mostly used for?
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Is corel draw a computer language?
No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.No. It is an application used for graphics.
Why save a file as html?
So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.So that it can be used as a web page.
What flammable gas used to be used in airships?
Hydrogen used to be used in airships.
What is the use of weight sets?
They are used for weighing.They are used for weighing.They are used for weighing.They are used for weighing.
How did the retiarii gladiators fight?
They used the net and trident.They used the net and trident.They used the net and trident.They used the net and trident.They used the net and trident.They used the net and trident.They used the net and trident.They used the net and trident.They used the net and trident.
Why and where are dogs being used?
Dogs are used in fire departments- they are used to smell out the people that are trapped inside the building Dogs are used in the police force-they are used to smell out evidencedogs are used for blinds- they are used to guide themdogs are used in backyards or front yards-they are used to scare away robbersdogs are used in houses- they are used for wither teaching kids responsibility or used for entertainment
