One of the exhibits at the science fair featured a working radio powered by a homemade electromagnet.    From LearnThat.org. 

An electromagnet is created when a piece of iron is coiled with a wire and electricity is passed through the coiled wire.    From Wordnik.com.  [Do you find me attractive?] Reference

The other arm carries a wire coil attached to an electric circuit-in other words, an electromagnet.    From Wordnik.com.  [The Economist: Correspondent's diary] Reference

(See electromagnet, magnet, and magnetic field.) 1.    From Wordnik.com.  [magnetism] Reference

A modern MRI unit consists of a very powerful electromagnet.    From Wordnik.com.  [The Nobel Prize in Physiology or Medicine 2003] Reference

For this reason, the field magnet is usually an electromagnet.    From Wordnik.com.  [General Science] Reference

By switching on a control current an electromagnet is excited.    From Wordnik.com.  [2. Important components of switches] Reference

Testing the orientation of an electromagnet with a small compass.    From Wordnik.com.  [Project Profile: Eureka « AAUW Dialog] Reference

Also, that thing Stark is showing Obadiah isn't an electromagnet.    From Wordnik.com.  [Iron Man Review - Favreau Delivers an Impeccable Superhero Flick « FirstShowing.net] Reference

This can be effected by a permanent magnet and also by an electromagnet.    From Wordnik.com.  [5. Magnetic Field] Reference

Edison, Thomas A. electromagnet electroplating e-mail embedded microchips encryption epoxy.    From Wordnik.com.  [23. Technology] Reference

The lowest frequency of electromagnet energy that can ionize cells thus corrupting their DNA.    From Wordnik.com.  [CNN Transcript Dec 17, 2009] Reference

The electromagnet scheme is probably best if you want to keep the pendulum in constant motion.    From Wordnik.com.  [Art Vandals Lack Creativity at cvillenews.com] Reference

On top of that, Stark is barely alive: an electromagnet keeps shrapnel from piercing his heart.    From Wordnik.com.  [Iron Man Review - Favreau Delivers an Impeccable Superhero Flick « FirstShowing.net] Reference

Have you ever seen a small bar magnet placed within the field of attraction of a large electromagnet?.    From Wordnik.com.  [Astounding Stories of Super-Science February 1930] Reference

Nancy Pelosi must be thinking someone on her team swallowed a bad news electromagnet the size of a Buick.    From Wordnik.com.  [Will Durst: Swamp Drainage Detritus] Reference

At the two poles of 15 mm x 20 mm each of an electromagnet, a magnetic flux density of 645 mT is present.    From Wordnik.com.  [5. Magnetic Field] Reference

Shimano's Calcutta DC reels have a continuously variable electromagnet inside the spool to control backlash.    From Wordnik.com.  [Avoid Backlash When Using Baitcasting Reels for Freshwater Fishing] Reference

Anything novel in the way of science attracted their bright, active minds as an electromagnet attracts steel.    From Wordnik.com.  [The Boy Inventors' Radio Telephone] Reference

Wounded and held hostage with a makeshift electromagnet stuck in your chest, you take a couple of sardine.    From Wordnik.com.  [Dan Persons: ReelzChannel: Step Aside, Iron Man: Top 10 Guys Gone Metal] Reference

To increase the strength of the electromagnet still further, the so-called horseshoe shape is used (Fig. 214).    From Wordnik.com.  [General Science] Reference

The science behind the performance works like this: A stationary electromagnet sits inside the large spool core.    From Wordnik.com.  [Reel & Line] Reference

In using a magnet for testing, it will be most satisfactory if it is an electromagnet and not of the permanent type.    From Wordnik.com.  [Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon] Reference

"But in that case the magnetism of the electromagnet was so large that the polarity of the small magnet was reversed!".    From Wordnik.com.  [Astounding Stories of Super-Science February 1930] Reference

Tony Stark shows his friend and business partner Obadiah Stane the electromagnet in his chest in a scene from Iron Man.    From Wordnik.com.  [Iron Man Review - Favreau Delivers an Impeccable Superhero Flick « FirstShowing.net] Reference

Sort of like in "Iron Man" when he had to carry around that car battery to keep his livesaving electromagnet powered up.    From Wordnik.com.  [McCain Team Falsely Charges That Obama Opposes Capital Punishment For Bin Laden] Reference

In August, 1896, I exposed the sodium flame to large magnetic forces by placing it between the poles of a strong electromagnet.    From Wordnik.com.  [Pieter Zeeman - Nobel Lecture] Reference

This armature is attracted by the electromagnet, E E (whose resistance is 1,200 ohms), whenever a current circulates through it.    From Wordnik.com.  [Scientific American Supplement, No. 360, November 25, 1882] Reference

Figure 1 to perform well as an electromagnet because it has no core.    From Wordnik.com. Reference

MRI uses a powerful electromagnet and a computer to show very detailed images of the brain.    From Wordnik.com. Reference

A relay is basically just a switch that can be closed by the electromagnet that's attached to it.    From Wordnik.com.  [Sunlight Foundation Transparency Ecosystem] Reference

These small, versatile Hall-effect devices are operated by the magnetic field from a permanent magnet or an electromagnet.    From Wordnik.com.  [Wireless Design Asia - Latest Updates] Reference

In this procedure, an electromagnet is positioned on the scalp over part of the brain called the supplementary motor area (SMA).    From Wordnik.com.  [Medlogs - Recent stories] Reference