Cite a Poem From a Book. EasyBib can help you cite a poem from a book, here's how: 1  Type in the ISBN of your text book (find inside the front of the book).  If more than one book is listed, double check the details and click Select on the correct book.
Inside a speaker, an electromagnet is placed in front of a permanent magnet. The permanent magnet is fixed firmly into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed.peakers come in all shapes and sizes, enabling you to listen to music on your iPod, enjoy a film at the cinema or hear a friendâs voice over the phone.
Lesson Summary. An electromagnet is a device that sends electricity through a coil of wire to produce a magnetic field. This leads to a magnet that can be controlled -- turned on and off with the flip of a switch, or increased or decreased in strength.The coils are often wrapped around a regular magnet to make it stronger.imited. A magnet is always a magnet. It always attracts. Sometimes you want that, such as with a fridge magnet, but not always. By using electromagnets, that all changes and the applications become endless. An electromagnet is a magnet that is created using an electric current -- created by electricity.