If you need to compress the coils just pust the wire against the head of the nail. To make an electromagnet wrap several inches of copper wire around an iron nail leaving 2 3 inches of wire loose on each end.
Press the button and the doorbell will ring.
How to make an electromagnet with a switch.
Put your fingers on the wire 20 inches from the end.
You can make a powerful dc electromagnet 80 times stronger than the ones made in a classroom quickly cheaply and easily.
A simple electromagnet consisting of a coil of insulated wire wrapped around an iron corethe strength of magnetic field generated is proportional to the amount of current through the winding.
How to make mini electromagnet homemade electromagnet magnetism science experiment duration.
When this electromagnet is turned on it must close a switch in the second circuit turning it on and powering a light bulb.
A battery a light and a switch controlled by the electromagnet in circuit one.
Open the switch and connect the wire from the other end of the nail to the terminal on the switch.
Electromagnet with a switch and battery.
Attach the other end of the wire from the positive terminal of the battery to the other terminal on the switch.
Keep in mind that the tighter the coils are the stronger the magnet will be.
Wrap the wire around the top of the steel spike starting where your fingers are on the wire.
Cut a short piece of wire and tape one end of it to the positive terminal of the battery.
How to make a toggle switch duration.
Then connect the stripped ends of the wire to a d battery by wrapping one around the positive end and the other around the negative end.
The first circuit must create an electromagnet.
Start wrapping your wire tightly around your nail.
Next use wire strippers to remove some of the insulation from both ends of the wire.
Make a variation of the circuit by replacing the lightbulb socket with a doorbell and the knife switch with a button switch.
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