Make simple homemade electromagnet: need wire, nails to make his body; a battery or power supply is supplied with current. Caution To scrape the paint permanent ferrite magnet wire ends, or with fire. To enameled wire wound in the same direction. To tie a knot tied at the end of enameled wire. Both ends of the magnetic properties of the permanent magnets and electromagnets strongest. Electromagnet magnetic force can be resized. Direction of the electromagnet can be changed. Magnetic solenoid can control freely. Principle after the solenoid is energized to produce a magnetic field like a bar magnet. Circle graph for wire cross-section electromagnet current point represents the screen, the screen fork representative inflow; arrow attached oval circle is the magnetic field lines. When direct current through a conductor creates a magnetic field, while a similar magnetic bar magnets made through the solenoid (Solenoid) conductor will be generated. In the center of the solenoid a magnetic substance is added to this magnetic substance is magnetized to achieve the effect of strong magnetic field. In general, the magnetic field strength generated by the electromagnet and DC size, number of turns and the center of permeable material related to the electromagnet in the design and selection guide will focus on the distribution of iron coil material, and use the size of the DC motor to control magnetic field strength. However, the coil material having a resistance which limits the size of the electromagnet a magnetic field can be generated, but with the discovery and application of the superconductor will have the opportunity to break the current limit. Solenoid | Guangdong Magnet | New Tong Xin magnetic provided by the Dongguan City, Tong Xin magnetic Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) strong, credible, in Dongguan, Guangdong magnetic materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the new Tong Xin magnetic and you hand into the brilliant, for a better future!