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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
What else can I help you with?
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?
it is used for cancer it is used for cancer it is used for cancer it is used for cancer it is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancerit is used for cancer it is used for cancer
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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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.
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.
What flammable gas used to be used in airships?
Hydrogen used to be used in airships.
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
How much cable was used on the golden gate bridge?
about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was used on the golden gate bridge about was 4 laps arround the earth of wire was used on the golden gate bridge
