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.
Observe the number of turns in an electromagnet's coil. A simple electromagnet can be made by wrapping a coil of wire around a nail and attaching its ends to a 1.5-volt battery, while commercial electromagnets have sizable cores of one of the magnet materials described above and large coils around them. You can also use the gaussmeter sensor to test the field strength at varying distances from the magnet. 2  Place the sensor at a series of defined distances from the magnet's pole and record the results. 3  This method would be suitable for teaching middle school and high school age students about magnetic fields.