Solenoid with a core definition of internal use of electric current through a coil to make it like a magnet has a magnetic device called a solenoid (electromagnet). Usually made of a bar or horseshoe. Core magnetization easy to use, and easy to disappear magnetic soft iron or silicon to the system to do. Such a magnetic solenoid-shaped magnet at power station, power outages after the disappeared. Electromagnet has an extremely wide range of applications in daily life. Electromagnet invention also makes the generator power has been greatly improved. Application electromagnet has an extremely wide range of applications in daily life. Electromagnet is a current magnetic effect (electric magnetism) of an application, are closely connected, such as electromagnetic relays, electromagnetic crane, magnetic levitation trains and life. DC solenoids and solenoid can be divided into two types of AC solenoids. If use according to divide the electromagnet, can mainly be divided into the following five kinds: (1) traction magnet - mainly used for pulling mechanism to open or close the various valves toy magnets, to perform automatic control tasks. (2) lifting magnet - used as a lifting device for lifting steel ingot, steel, iron ore and other ferromagnetic materials. (3) the brake magnet - mainly used for motor parking brake in order to achieve an accurate aim. (4) Automatic electrical electromagnetic systems - such as electromagnetic relays and contactors electromagnetic system automatically switches the electromagnetic release and operating electromagnet and so on. (5) other uses electromagnets - such as grinding and electromagnetic sucker electromagnetic vibrator. Permanent magnet energy difference between two energy levels that when the time or energy -Ω that when Δ Δ. Before closing key rheostat sliding contacts should correct position. Key before sliding rheostat should contact the correct position. Large limiting solution available metal wire ammeter should add little resistance metal wire rheostat resistance ammeter should not external current limiting resistor can be used relatively large painting outlet connection diagram below resistance analogy drawn outlet connection diagram below cases a barrier around its resistance to flow table Ω (μ, there is a choice of about Ω resistor whose resistance equipment is equipment that flow table (μ.Ω) flow meter (μ, flow meter (μ, Ω) pressure Table (, Ω pressure gauge (round pie magnet, Ω pressure gauge (, Ω pressure gauge (, Ω DC power source slide rheostat (Ω, keys and several wires. keys and some wires. try to select the appropriate equipment selection proper road test to select the appropriate equipment to select the appropriate way to accurately measure and draw as much as possible to make a way out of physical wiring diagram as shown again. Accurate and then draw a way as physical connection diagram shown. pressure gauge Select the table due to decompression tables stream sliding rheostat resistance is significantly less than the test resistance due to sliding rheostat resistance is significantly smaller than the sliding rheostat resistance test required by the divider connection. rheostat necessary connection with the divider. If selected pressure gauge Because the source voltage source because of its lack of pressure if the pressure gauge scale when selected as the source pressure is not permanent magnetic energy difference between the two levels namely that when the energy Δ Δ such as when the speaker magnet | New Tong Xin magnetic (certified) | Zhuhai magnet provided by the Dongguan City, Tong Xin magnetic Limited Dongguan City, Tong Xin magnetic Limited (www.dgxtxmagnet.com/) is Dongguan, Guangdong, magnetic leader, over the years, the company is implementing the scientific management, innovation and development , the principle of honesty and trustworthiness, and satisfy customer needs. In the new Tong Xin magnetic leadership with the staff warmly welcome all inquiries to discuss, with new magnetic Tong Xin a better future.