The strength of a DC electromagnet's magnetism is related to many factors. It is positively correlated with the current magnitude and the number of turns in the coil, and is also greatly influenced by whether it has an iron core. In other words, when the current through the electromagnet is the same, the more turns the coil has, the stronger the magnetism. When the number of turns is the same, the greater the current, the stronger the magnetism.
A DC electromagnet is an electromagnetic device. When energized, it exhibits magnetism, and when de-energized, this magnetism disappears. The strength of an electromagnet's magnetism can be controlled by the strength of the current or the number of turns in the coil. It can also be controlled by adjusting the resistance to control the current magnitude. Therefore, the strength of the magnetism is greatly influenced by the current magnitude, the number of turns in the coil, and the presence or absence of an iron core. Electromagnets have extremely wide applications in daily life. Their invention has greatly improved the power of generators, solving many problems in people's lives, thus providing significant assistance.