Request an appointment. Familial adenomatous polyposis (FAP) is a rare, inherited condition that causes extra tissue (polyps) to form in your large intestine (colon) and rectum. Polyps can also occur in the upper gastrointestinal tract, especially the upper part of your small intestine (duodenum).
An iron core will produce the strongest magnet. By increasing the size of the core you also increase the strength of the electromagnet. Compare the diagrams. Note: Look at the amount of coils, the size and number of the power source.
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.