What is the function of magnetic poles?
2 Answers
Like poles repel each other, while unlike poles attract each other. The following is an explanation about magnetic poles: 1. Introduction to Magnetic Poles: The parts of a magnet with the strongest magnetic properties are called magnetic poles. A magnetic field exists around a magnet, and the interaction between magnets is mediated by this magnetic field. No matter how small a magnet is, it always has two poles. When a magnet is free to rotate in a horizontal plane, it will come to rest with one pole pointing south and the other pointing north. The pole pointing south is called the South Pole (S pole), and the pole pointing north is called the North Pole (N pole). 2. Magnetic Phenomena: Unlike poles of different magnets attract each other, while like poles repel each other. The magnetic poles of any magnet always appear in pairs. Breaking a magnet into two pieces does not separate its North Pole from its South Pole; instead, each half of the magnet has its own North Pole and South Pole. This is a fundamental characteristic of magnetic phenomena.
I remember since childhood repairing various automotive electric motors, where the magnetic poles play a central role. They are primarily responsible for generating a stable magnetic field. Specifically, in alternators or starter motors, the magnetic poles are either made of permanent magnets or wound with electromagnetic coils, enabling the copper coils to cut through magnetic lines and generate electricity. Without them, the car battery wouldn't charge, and the engine wouldn't turn over during startup. I've also seen magnetic poles made of different materials, such as permanent magnet types which save power, but over time they may demagnetize, leading to insufficient generator output, which then lights up the dashboard warning light. So during repairs, I always prioritize checking this component to ensure it's not corroded or loose, preventing the car from breaking down midway. Overall, though small, the magnetic poles support the smooth operation of the entire electrical system, so don't overlook them during routine maintenance.
