how do you make a electromagnet batter?
367283
Batter? 3 eggs, 2 cups flour, 1 tbs baking soda, 1 cup sugar, 3 AA batteries....
1029513
has to be metal, preferably in several sheets not touching each other. Wood and plastic do not stop magnetic field.\n\nThick piece of lead would definitely work, and is completely safe (as long as you do not drop it on your foot and wash your hands afterwards)
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.
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.
843269
Use the Nickel Metal..Put your steel into a electrolysis solution of Nickle  electrolytes and charge it with electric anode and cathodes.
561277
MAGNET THATS POWERED BY ELECTRICITY
454527
wrap the bar in insulated copper wire, preferably solid core, keeping the wraps smooth and close together, and wrap three layers deep- when you reach the end of the first layer just wrap back towards the end you started at, same thing on third layer- them hook a DC power supply to the ends of the wire wrap, and let the thing run for 3-4 days (make sure when you hook it up that it doesn't heat much if any) pretty soon you've got a magnet.
847700
i would try to find two sheets of a fine metal mesh. Use the first sheet to charge the incoming air and the second sheet as the negative attracting grid. place them about an inch from eachothers and attach the positive and negative terminals each to a sheet. I would use a car battery as this gives you the most voltage of something that is portable. Whatever source you get make sure it is dc and that each sheet of wire mesh is insulated from the other or else the electrostatic effect wont work. Or if you have ever seen the ionic breeze by sharper image it uses three or four metal plates placed side by side to achieve dust collection. This may work also.
23227
It uses a permanent magnet which is rotated by a crank. The spinning magnet is positioned so that its north and south poles passed by a piece of iron wrapped with wire. It was discovered that the spinning magnet produced a pulse of current in the wire each time a pole passed the coil. Furthermore, the north and south poles of the magnet induce currents in opposite directions. By adding a commutator, it is possible to convert the alternating current to direct current.
266808
Create an electromagnet by coiling the wire around the steel rod and attatching the wire to the power supply (put the ammeter in the circuit somewhere (in series). Use the retort stands to hold the weighing scales above the electromagnet. Place the 6 magnets in the weighing scale whilie the power supply is off. See what the weight of the magnets is. switch the power on and see whether there is any change in the weight. try repeating this a few times using different currents (measured on the ammeter). 100grams=approx 1Newton of force
209289
start here:\nhttp://en.wikipedia.org/wiki/Magnet
71953
Or you can make a dynamic mike with a strip of tinfoil suspended between the poles of a strong magnet; only puts out a few millivolts so needs lots of amplification.  Or use the old telephone mike technique, a bunch of carbon particles pressed lightly together in an insulating case with metal end caps; this behaves like a variable resistance so you need to connect it to a DC source and amplify the voltage changes across it.  Or you could get really ambitious and make a condenser mike; but this one's extra tricky to implement since you need two parallel metal plates, one rigid and the other foil; bias them with a high voltage from a high impedance source, amplify the output.
361367
atach a wire to each part of the batter, attach them to the light. create a circuit and you will have light
484887
Mix 1 cup of flour, 1 cup of yellow cornmeal, and 1 teaspoon of sugar in a bowl. \nTake a 1-quart container of water and pour just enough of it into the mixture to make a heavy dough. \nRoll the dough into balls about 1/2 inch to 1 inch in diameter. \nMix the rest of the water with 1 cup of molasses and pour it into a pan. \nPut the pan on the stove and bring the molasses and water to a boil. \nWhen the mixture is boiling, drop in several doughballs, but don't overcrowd them. Cook them for 2 to 3 minutes. \nCook the rest of the doughballs, a few at a time, in the same way
513117
use a potato and two different metals as electrodes. The link will help you, do your own homework, or web searching atleast! it was the second link in google for g** sake!
878745
electricity is either made by chemical reactions, or by moving a magnetnic field over a copper wire, as i am sure you allready know, so the problem is geting a force that can move the magnet, to give inductance in the wire. causing a current to flow.\nwater turns the blades of a fan, or tubine whitch is conected to a magnet witch turns inside a copper coil.\nso any natural way that can generate enough force to move the magnet, can be used.\nwith nuclear the heat is made in a chamber called a reactor whitch turns the water to steam the steam turns the turbine whitch is conected to the magnet.\nif you have a propella connected to a magnet that is moved by wind that is driven by the sun, inside a copper coil you get some electricity\nin water fall the downward force of the water turns the blades, withch turn the magnet, inside a coil,\nall diffrent ways of doing the same thing.\nnot sure about forrest though, unless you burn the wood to make steam, to guess what turn the magnet inside the copper coil. or maybe you could cover the tree in magnets, and buld a copper coil next to it, then wait for the wind to sway the tree
883128
Use a magnet. Iron is attracted to it, lead is not.