http://www.ck12.org Chapter 25. Electromagnetism
CHAPTER
25 Electromagnetism
Chapter Outline
25.1 Electricity and Magnetism
25.2 USINGELECTROMAGNETISM
25.3 GENERATING ANDUSINGELECTRICITY
25.4 REFERENCES
What’s dangling from the end of this big crane? It seems to be a very large magnet because metal objects are sticking
to it. That’s exactly what it is. With the flick of a switch, the crane operator can turn on the magnet and use it to
pick up objects off the ground. Then with another flick of the switch, the operator can turn off the magnet to drop
the objects in the container. How does this happen? How can a magnet be turned on or off so easily? In this chapter,
you’ll find out.
Image copyright dvande, 2013 .www.shutterstock.com.Used under license from Shutterstock.com.