What is the easiest way to make an electromagnet?
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.
1044288
You can make any simple machine having fulcrum, load and effort or u can even make a pulley.(These r very cheap and easy to make)\n\nFor ur project on universe u can get information from any encyclopedia or search in net.
1054406
And just how do you propose I put a diagram on Y!A?\n\nNonetheless, electricity can be used to generate electricity, as mentioned.  Put three magnets around a rotating shaft & you get 3Φ electricity.\n\nMagnets work in compasses to help a person find direction.\n\nMagnets can be used to hold cabinet doors closed.\n\nMagnets can be used to lift things (like in a junkyard to move vehicles to a compactor), or to remotely move magnetic items (like if you can't reach your car keys, you could retrieve them with a strong enough magnet).
178224
Do you mean 2 pole motor.\n\nYou can make a simple home made version which demonstrates basic electromagnetic principle of a rotating machine.\nCreating a wire wound rotor within a field or stator winding.
702587
It won't be easy to calculate.  You can easily calculate the strength of the magnetic field of the electromagnet with the current and the number of turns.  But it's harder to know the field strength of the bar magnet, and even harder to calculate the force produced by the interaction between the fields.  Once you got that force, it's easy to compare that to the gravitational force on the mass of the bar magnet.  It's probably easier just to build it and try it.  All you really need is a coil of wire and a current.\n\nOnce you have the apparatus, borrow an instrument to measure the fields.  I'd have more fun with a ball bearing on a circular (non-magnetic) track, timing the current to make the ball move around the track, like a cyclotron.
1180425
May b u cud try something from a post office box. Its simple as its based on wheat stone bridge.\n\nOr may be u cud study effect of frequency on reactance of inductor/capacitor. \n\nThese r easy and all viva is from theory only. No need to study extra...\n\ngud luck for ur boards.\n\n\nthere is nothing like 'good level'. u cud pick up any topic, even the simplest 1 n make a gr8 project out of it. some more suggestions - time period of physical pendulum, obtaining points where b=0 for various magnets etc. dont u hav enough lab manuals, friends to give u details. ask ur teachers they will help u.\n\n\naur waise bhi yaar, just chill, if u dont make ur proj ur school will surely make 1 for u. after all its reputation is at stake
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.
769618
go 4 d c motor ,,,, model of it is easy n interesting, eye catcher.... i made that last yr n got highest marks... :-)... it ll include both elec n magnetics..
695795
Did this way back in Boy Scouts....Relatively easy...just need to build 2 electromagnets and a series circuit..... I'll see if instructions are online.\nhttp://www.terrax.org/comm/morsecode/buzzer2.aspx\nhttp://chss3.montclair.edu/~pererat/perbuild.htm\nthe second one is similar to what I built
130907
Most magnets are formed by moving electrons. Each moving electron creates a small magnetic field. If lots of electrons are moving along the same path, they create a bigger magnetic field. Because of this you can make a magnet by using electric current. If you wrap a coil of wire around a piece of iron (like a big nail) and then put electricity through it using a battery, you will create a magnetic field. This is what we call an "electromagnet." Remember, only use batteries if you try this, never use a wall outlet--this is much too dangerous!!
52883
A moving charged particle will create a magnetic field.  Conversely, a moving magentic field can make an electric current.  The orientation of the magnetic field goes around the current.  So if you coil a copper wire and run a current through it, all of the magnetic field will add together in the middle of the coil and make a magnetic field.  You can wrap a wire around a steel rod, and make an electromagnet in this way.  But in electronics, what they can do is put two coils in close proximity.  As you run current through one coil, it creates a magnetic field.  The creation of the new magnetic field in the vicinity of the other coil will induce a current in that second coil.  This is called and inductor, and that's how induction works.
997877
that's sweet here i think is a link for a patent. I was thinking on how to make something like that, accelerating itself but i failed :P another of my questions was proven wrong leading me to the conclusion it is impossible for magnets to be used in mine.\n\nhttp://www.inventhelp.com/contactform_patent.asp?id=106&wcw=overture&GCID=S17330x002&KEYWORD=patent+office&MATCHTYPE=search
198626
You could measure the strength of an electromagnet by hanging small iron \nweights from the magnet.  When the applied weight (force of gravity acting \non the weights) exceeds the force of the magnet, the weights will fall \noff.  Steel Flat washers of the same diameter as the coil would be \ninexpensive and simple to use.  You can weigh several washers on a food \nscale and calculate the average weight of each washer.\n\nThe equation for the magnetic field strength, H0, in Ampere-turns per \nmeter for an empty (air) coil is:\nH0 = the applied voltage / (the number of turns of wire in the coil \nwinding X Area within the coil winding X the permeability of air).\nThe area is pie X D squared/4, where D is the diameter of the coil winding \nin meters.\nThe permeability of air,  , is 4 X pie X 10 to the - 7  henry/meter\n\nThe Equation is for a direct current.  An alternating current applied to \nthe coil cannot be used for lifting magnetic objects.  \n\nBy substituting different numbers for the applied voltage, the number of \nturns of wire and the diameter of the coil, you can calculate how each \nparameter will effect the strength of the magnet.\n\nElectromagnets can be fun, however,  keep them away from recorded tapes or \nthey will erase the contents.
609714
Take a compass and a bar magnet and let them trace the field lines. Or better yet, take a piece of paper with metal shaving on it, then place a magnet underneath. The shaving will align with the field lines. Pretty cool.
746721
Anything where an electrical currant passes thru it,  also has an electromagnetic field, around it.\n Simple test- scatter iron fillings onto sheet of paper,place over circuit,motor,speaker etc, watch fillings change shape/format to that of electromagnetic field.
404423
A simple AC electric generator simply involved rotating a magnet inside a coil, or rotating a rectangular coil inside a magnetic field (which is a little trickier requiring conducting rings at the ends of the coil and carbon brushes to connect the rotating coil to the external circuit).\n\nAs the coils pass through the magnetic field, the current induced is proportional to the strength of the magnetic field, the speed at which the coil passes through the field, and the area of the coil, and the number of turns in the coil.\n\nThe maximum electromotive force generated in each turn of the coil, (essentially, the voltage amplitude of the AC current produced), is given by:\n\nEMF = NBAw\n\nN = number of turns in coil\nB = magnetic field\nA = area of coil\nw = angular frequency of coil = 2 pi / T  \n(T = period)\n\n A single loop of wire passing slowly thought a weak magnetic field will produce the lowest possible current, which will appear alternating pulses if measurable at all. Increasing the contributing factors slowly will allow you to find the threshold at which AC current can be detected.
805418
Here's a site with alot of different ideas and difficulty levels with instructions.  Maybe you can find something here.\n\nOr you can tell us more about what you are wanting to do and what you like and we might be more helpful on here.\n\nhttp://www.all-science-fair-projects.com/