You can easily create a small electromagnet yourself by connecting the ends of a copper wire to the positive and negative ends of an AA, C or D-cell battery. This creates a small magnetic field. If you disconnect either end of the wire from the battery, the magnetic field is taken away...
The Strength of an Electromagnet Basic electromagnets aren't all that complicated; you can construct a simple one yourself using materials you probably have lying around the house. Take a conductive wire, usually insulated copper, and wind it around a metal rod, also called a solenoid. The wi...
Relays are amazingly simple devices. There are four parts in every relay: Electromagnet Armature that can be attracted by the electromagnet Spring Set of electrical contacts The following figure shows these four parts in action: In this figure, you can see that a relay consists of two separate ...
An electromagnet is the basis of an electric motor. Say that you created a simple electromagnet by wrapping 100 loops of wire around a nail and connecting it to a battery. The nail would become a magnet and have a north and south pole while the battery is connected. Now say that you ta...
This graphic shows a simple metal oxide varistor (MOV) surge protector with line conditioning and a fuse. HowStuffWorks In the most common type of surge protector, a component called a metal oxide varistor (MOV) diverts the extra voltage. As you can see in the diagram to the left, an...
2. Start Your Letter of Interest for a Job with a Hook You're the needle. The haystack is all the junk email the manager gets. How can you make sure they find you? You must learn to write a letter of interest that catches their attention like an electromagnet. You need a hook. Use...
The MRI scanner can pick out a very small point inside the patient's body and ask it, essentially, "What type of tissue are you?" The system goes through the patient's body point by point, building up a map of tissue types. It then integrates all of this information to create 2-D...
That shows how to write a reference letter for a student that works like an electromagnet. It's detailed and intensifies the interest. If you can't crow quite that much. don't worry. Just make sure to: Share details about how you know the applicant. Add a fact that shows why you thi...
How can one identify oncogenes? What is a recognition protein? How can one tell which devices have an electromagnet and which devices do not? What is the amplitude of a pendulum? What is the global conveyor belt? What does a seismometer measure?
To create an electromagnet, you will need the following: Magnet wire An iron nail at least 3 inches long Dry cell battery Electrical tape Wire strippers Thumb tacksorpaper clips Using the materials above and following the simple diagram, do the following: ...