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The power of the battery controlling it.
An Electromagnet is magnetic..... It can also be switched between positive and negative by the power source being turned around(battery)
make an electromagnet stronger by doing these things: * wrapping the coil around an iron core * adding more turns to the coil * increasing the current flowing through the coil.
the way in which the positive & negative terminals on the battery or power supply are attached to the electromagnet. switching the leads from the positive terminal to the negative one, and the negative one to the positive terminal should reverse the polarity of your electromagnet.
i am pretty sure the size of nail doesn't matter.
For a simple copper wire around iron nail electromagnet, increasing the number of rounds the copper wire makes around the nail will increase the electromagnet's strength. Also, increasing the voltage applied(adding a battery) will increase the magnetic field.
A core
The power of the battery controlling it.
A Battery, wire, nail/metal cylinder.
If the electromagnet has a core, which has become magnetized, then the core will have a residual magnetic field when the power is removed.
Every thing except a conducting wire, battery and a soft iron core is not needed for making an electromagnet
If you have a big sound system in your truck then it could be a good idea to add a second battery, also if you have a winch or some kind of after market lights then you might want to add another battery so you don't stress the single battery.
An Electromagnet is magnetic..... It can also be switched between positive and negative by the power source being turned around(battery)
it is called an electromagnet
Is a eletromagnet with a six volt lantern battery really powerful or not?
Adding more turns of wire to the electromagnet will make it stronger without changing the applied voltage.
make an electromagnet stronger by doing these things: * wrapping the coil around an iron core * adding more turns to the coil * increasing the current flowing through the coil.