how electric irons working??
364488
Wikipedia will tell you, if you check this link:\nhttp://en.wikipedia.org/wiki/Ironing
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I think that metal detectors just work by setting up a magnetic field. When the apparatus move over a location that has a magnetic material a flux is produced that induces an electric current in the metal detector, activating a sensor.\n\nIf this is the case (i'm 95% sure it is), then the only factors affecting it's quaility would be within the machine itself as far the smallest current that activates the sensor.\n\nHeat and moisture would not change the magnetic field (moisture might theoretically alter the detectors magnetic field a little bit, but certainly not enough to measure). The both give the same result.
682407
This is done to link the flux produced in one coil with the other one.Each time the current reverses in the first coil the magnetic flux also reverses which if properly linked with the second coil will induce an emf in the second one as the induced emf will produce a magnetic field which opposes the change in the magnetic field due to the first coil.Iron has a high value of relative magnetic permeability.Thus most of the magnetic flux due to the first coil will pass through it.And if a second coil is wound over it the changing flux will pass through that one too.
225293
According to how stuff works kinetic watches (at least some) hold the energy in a spring that is wound when the watch is moved.  So electricity is never really used.\n\nI am updating because after further research I found this site that shows a kinetic watch using electricty.  A couple of ways to figure this out could be to use a multimeter to where the charge is held, maybe a coil with a total voltage multiplication of one near the watches coil then connect to a multimeter, and the best choice contact the watch maker!
1146414
http://science.howstuffworks.com/electricity.htm
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make and working elctric circuit like a bell, r a bulb, u can Also explain working of an electromagnet using a model.\nu can also expain the capillarity concept
82937
The electric company generates (makes) electricty, which they send through wires. These wires go to every house. In some places, you can seem them on the street, but in most places they are underground.\n\nWhen you flip a switch, your are connecting the lightbulb to one of these wires. So electricity flows from the wire to the lightbulb. When you close the switch, you disconnect the 2 wires.\n\nThat is what happens. How electricty is made, and how lightbulbs and switches works is a bit more complicated, but for that I suggest Wikipedia:\n\nhttp://en.wikipedia.org/wiki/Electricity\n\nThe basic idea behind generating electricity though, is that you are freeing electrons from atoms, which then go to other atom/s that absorb them.
788487
in moving iron type instrument, the torque produced is directly propotional to the square of the current flowing through it. thus the scale is not uniform
19579
magnetig breaking can be done in 2 ways.  like the electric cars you see you can use the natural magnetic force to generate electricity while the car is rolling but decellerating. the natural resistance will slow the car.\n\nmore effective is what they use to propell and stop maglif trains.  they use electro magnets not permanent magnets i assume you know oposites attract and likes repel. N= north S= south \n\nN+N repel \nN+S attract\n\non a permanent magnet you have to turn the actual magnet to repel or attract the other\n\nin an electro magnet you need only reverse the electro magnetic field.  basically \n\nso when you have a series of magnets all in a row you rapidly switch the field back and forth in time with the passage of the magnets over the other magnets.  to make the train go you turn the magnets polarity so it pulls to the south pole of the other magnet then as it passes you switch the magnet around electrically so it pushes away from the magnet it was just pulling towards.  electric breaking is just the oposite. as the magnets aproach you turn N toward N and as they pass you turn one so they become N to S  the approaching magnets push against eachother thus causing MAGNETIC RESISTANCE then as they pass you switch one so as they seperate you need more energy to seperate them thus slowing the vehicle.\n\n\nI know it was hard to follow but without being able to actually show you it is hard to explain
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Well, the easiest way is to get some wire, wrap it around a iron/steel rod, and apply a current to the wire.\n\nTo get an electromagnet to have a lifting capacity that you specified, it will require a little more engineering work.  Trying to stay in the most basic terms, the power of your magnet will depend on how much current you put through the wire, how many turns you have around the iron rod, and something called the magnetic permeability of the iron rod.  Now there's some trade-offs with all of these factors.  More turns increases the magnet flux (strength), but requires more wire and increases the resistance.  More resistance means that you will need more current to counteract this problem.  Treating your electromagnet strictly as a resistor (which it is not), by following Ohm's law, you increase the current by increasing the voltage.   Too much current and you may end up melting your wire.   You want to keep the wire as small as possible so that you can get the turns as close as possible to your iron rod, but smaller wire has a higher resistance and lower current carrying capability.\n\nIt's a matter of balancing a lot of equations to get the best combination.  Your best bet is a little trial and error.
730492
Think of a magnet as a bunch of tiny magnets all aligned in the same direction. That's what gives it it's north-south poles. A piece of iron has those same tiny magnets inside, but they are not lined up. They are jumbled in all different directions and therefore the iron does not act like a magnet. But put it next to a magnet, at either pole, and all the pieces will line up with the magnet's tiny parts. Basically becoming part of the magnet. If the piece of iron stays next to the magnet long enough, the iron will stay magnetized even when moved away. But it will slowly get weaker as all its little magnet "parts" lose their alignment.
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See the link\n\nfoi iron Z=26  this is the formula of the distribution of electrons on shells and subshells\n\n1s2 \n2s2 2p6\n3s2 3p6 3d6\n4s2
591035
Ferromags are substances that are strongly attracted by a magnetic substance. Some ferromagnetic  metals are iron, cobalt, nickel, gadolinium and dysprosium. To generate electricity from ferromags, take two iron sheets 5 cm wide. rub both of them using a bar magnet only in one direction for about 10 minutes. This will impart magnetic properties to d iron sheet. Then u arrange the sheets in such a way that u feel d force of attraction between the sheets. take a copper wire. make a loop out of it. rotate d loop in d space between d sheets with a constant frequency. Voila electricity generated at d ends of d loop
25604
I an, I'd really like to see your ball flight. I'd imagine you're hitting the ball with your driver very low and it's rolling most of the 240 yards. \n\nThe most important thing for irons is clubhead speed and ball position. The ball has got to be in the middle of your stance, not back towards your right toe (for a righty). And then you have to generate sufficient clubhead speed, at least 85 MPH, with a good strike on the ball that should get pretty decent distance. \n\nIf you can't swing at least 85 MPH with a 5 iron (have your swing speed measured at a Golf Galaxy or other store) then you might want to look into a hybrid set of irons that have large soles to help get the ball up. \n\nGood luck!
1084812
Iron is usually attracted to a magnet. If a bar of iron is magnetized, One end of the bar will attract one pole of the magnet, and repel the other pole of the magnet. \nCopper, nickel, and zinc are not magnetic. They neither attract or repel a magnet, and they cannot be magnetized.
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Magnetization of materials\n\nFerromagnetic materials can be magnetized in the following ways:\n\n* Placing the item in an external magnetic field will result in the item retaining some of the magnetism on removal. Vibration has been shown to increase the effect. Ferrous materials aligned with the earth's magnetic field and which are subject to vibration (e.g. frame of a conveyor) have been shown to acquire significant residual magnetism.\n    \n* Placing the item in a solenoid with a direct current passing through it.\n    \n* Stroking - An existing magnet is moved from one end of the item to the other repeatedly in the same direction.\n    \n* Placing a steel bar in a magnetic field, then heating it to a high temperature and then finally hammering it as it cools. This can be done by laying the magnet in a North-South direction in the Earth's magnetic field. In this case, the magnet is not very strong but the effect is permanent.\nMagnetization of materials\n\nFerromagnetic materials can be magnetized in the following ways:\n\n* Placing the item in an external magnetic field will result in the item retaining some of the magnetism on removal. Vibration has been shown to increase the effect. Ferrous materials aligned with the earth's magnetic field and which are subject to vibration (e.g. frame of a conveyor) have been shown to acquire significant residual magnetism.\n    \n* Placing the item in a solenoid with a direct current passing through it.\n    \n* Stroking - An existing magnet is moved from one end of the item to the other repeatedly in the same direction.\n    \n* Placing a steel bar in a magnetic field, then heating it to a high temperature and then finally hammering it as it cools. This can be done by laying the magnet in a North-South direction in the Earth's magnetic field. In this case, the magnet is not very strong but the effect is permanent.
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If you are using the hall effect switch itself to change the magnetic field, I guess we would need to know what the amperage requirement of the electromagnet is to spec out the part.  \n\nThis answer is also difficult because we don't know the strength of the magnetic field used to trip the switch nor the time which the magnet would be in the switch range nor the distance from the magnet to the switch.\n\nIf you have access to a bunch of reed or hall effect switches, I would suggest trying several to see which one works?\n\nAlso -- a suggestion -- i would use the hall effect switch as a sensor switch only and not try to run it as a direct switch connected to an electromagnet.  Use it to trip a transistor or FET that will, in turn, drive the electromagnet.  \n\nDoes this help?