A relay is a simple electromechanical switch made up of an electromagnet and a set of contacts. Relays are found hidden in all sorts of devices. In fact, some of the first computers ever built used relays to implement Boolean gates. In this article, we will look at how relays wor...
How to Make an Electromagnet Sources Share: Citation More Awesome Stuff Up Next How Electromagnetic Propulsion Will Work Explore More Home Improvement How Doorbells Work Physical Science How Solenoids Work Physical Science How Magnets Work Electronics How Electric Motors Work Electronics How ...
How to Make an Electromagnet Leave about a 4” end of wire loose and then tightly wrap the wire around the nail or bolt. Wrap it as many times as possible leaving just a small amount of exposed metal at each end. The more coils, the stronger the electromagnet. Secure with tape. Leave...
First, let's take an electromagnet. It's easy to make a simple electromagnet — all you need is a battery, some insulated copper wire, and an iron nail. Wrap the wire around the iron nail, leaving enough wire on either end to connect to the battery. Make sure each time you wrap aro...
You now have an electromagnet with several inches of extra wire at each end. Step 4 Strip the ends of the wires bare. One of the easiest ways to do this is to burn the last inch of enamel off each with a lighter or match. Wait a few seconds for the wire to cool, then rub the...
To make an electromagnet, you’ll need either a 6- or 9-volt battery, 10 feet or more of insulated wire and an iron bolt or nail. The insulation need not be thick; in fact, the thinner it is, the more wire you can put on your bolt. Wrap the wire around the middle part of the...
5. Turn the jar in place. Does the needle continue to point north? The metallic core of the earth helps create the earth’s magnetic field with north and south poles. The compass reacts with the earth’s poles to point in the direction of the earth’s North Pole. ...
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As we've already discussed, a generator converts mechanical energy into electricity. A motor works on the same principles, but in the opposite direction -- it converts electrical energy into mechanical energy. To do this, a motor needs a special kind of magnet known as anelectromagnet. In ...