what is the procedure for increasing the magnetic force?tell me uses of electromagnet&what is magnetic field?
115800
I hope you are familiar with atomic theory if not get familiar and come back to this. as an electron moves it creates a wake much like a boat moving through water this wake is called a magnetic line of force. if a nother electron is encountered by this wake it will be influenced by it like a surfer on a wave. an electromagnetic fiel is the area of influence of these waves. in most materials the electrons are moving in many different directions, hence the sum field is random and weak. however if most of the electrons are coerced into a uniform movement the individual lines become coherent and combine to provide a polarised field with a stronger magnetic influence moving this fiel across an object will cause the electrons in it to surf and produce an electric current. however these surfing electrons will produce a magnetic field that is the opposite of the field they are surfing on.
856622
Glad to see you're thinking, but this is an easily answered question.  \n\nTake for example a magnet.  Regardless of what is in front of your magnet it will still attract an object to a distance equal to its strength.\n\nex:\n\n.....(|)<<<< <[]<<<<<<<[]          \n\n......^..............^...... ......^\nMagnet......Metal..... ..Metal\n.................Object.... Object\n\nThe magnet is going to exert force on both of the objects without interference from first object.  \n\nBased on your definition of propagate...come to your own conclusion...that is the joy of thinking...we all have our own thoughts.
343621
Try googling "magnetic levitation circuit"\n\nHere is one of the many hits I got.
883128
Use a magnet. Iron is attracted to it, lead is not.
105221
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.
269660
Basic electricmagnet....wrap thin insulated wire around a nail....connect the ends of a wire to a battery.  Increase the size of the nail....increase the number of wraps of thin insulated wire.....and lastly increase the amount of battery and you will increase the strength of the magnet.
988018
Only magnetic force that breaks thru the coil field will produce electricity. you can take a old electric motor and spin it and it will generate electricity. but if you remove on magnet it will not produce. place the magnet on the out side and it will not produce. it has to make a force between the fields. it is the disruption of this force and the coil fields that produce electricity.
401655
Short answer:  Electricity and magnetism are two sides of the same coin; each can cause the other.  For instance, moving a wire through a magnetic field can create a current, while current flowing through a wire also creates a magnetic field.  Thus, one can generate electricty by using some kinetic energy source--water, wind, what have you--move powerful magnets through wire coils.  There are other ways, of course.
531203
prooly need ifrared thingy\ntry a industrial magnet
31282
magnet \n\nAn object that attracts iron and some other materials. Magnets are said to generate a magnetic field around themselves. Every magnet has two poles, called the north and south poles. Magnetic poles exert forces on each other in such a way that like poles repel and unlike poles attract each other. A compass is a small magnet that is affected by the magnetic field of the Earth in such a way that it points to a magnetic pole of the Earth. (See magnetic field and magnetism.)
683251
I just helped my daughter with her science project. We made an electromagnet. Very easy to build and you can get buzzers, lights, and battery holders a your nearest hobby Lobby. you can also get toggle switches at the local hardware store. Mount it all on a nice piece of wood and your in business. by the way, my daughter took home first place!
805479
Get two pieces of iron block. Turn a coil round one of them. Pass electric current through the one which has the coil turned round it. This will make the coiled piece of iron act like a magnet and will attract the other piece of iron. And you have made an electromagnet.
651275
I am not 100% sure what you are asking but electromagnetic force is considerably stronger than gravitational force. Just think a fridge magnet can pick up a paper clip which has the entirety of the earth pulling down on it. So it would probably be easier to attract people with electromagnetics than gravity even though our mass is much greater than our charge
560218
instead of counting the number of flux to determine the strength of the force, i suggest u hang a piece of metal on a string, then investigate the angle of the string when u put a magnet at different distance. Because with this experiment, u can calculate the force much more easily through the angel and length of the string with the knowledge of gravitational force.\n\nThe flux suggestion is good, but how do u determine the force? There r much more complicated theory behind it and they r less intuitive than gravitational force.
114658
Get a magnet and try it.\n\nRead the last sentence of the link below:
29050
piece of metal that is exposed to an electromagnetic field\n\n\nBasically the individual atoms of the material are polarized to begin with, but they're scrambled among each other. Putting them in a magnetic field just makes many of them align and have a higher degree of directional attraction.
605330
well, if an object is moving, there must be some physical force applied to it - magnetic field, static electicity, pull from a sting, air pressure from a fan.