Bhai.. question puchh rahe ho ya @ns bata rahe hoo...... Chalo question me puchh leta hu ~~~~~> WHY ELECTRIC MOTOR DO NOT USE PERMANENT MAGNETS..... haha!

B Electric Motors and Permanent Magnets
Electric motors are devices that convert electrical energy into mechanical energy. They work on the principle of electromagnetism, which involves the interaction between electric currents and magnetic fields. While some electric motors do use permanent magnets, many others do not. In this response, we will explain why electric motors don't always use permanent magnets and how they generate magnetic fields through electromagnetism.

b Electromagnetism and Magnetic Fields
Electromagnetism is the phenomenon that occurs when an electric current flows through a conductor, creating a magnetic field around it. This magnetic field can be used to produce motion in an electric motor. To understand why permanent magnets are not always necessary, we need to explore how magnetic fields are generated in electric motors.

b Electromagnetization in Electric Motors
Electric motors typically consist of a coil of wire called an armature, which is wound around a central core. When an electric current is passed through the coil, it becomes electromagnetized, generating a magnetic field. This magnetic field interacts with the fixed magnetic field produced by a separate component called the stator. The interaction between these two magnetic fields creates a force that causes the armature to rotate, resulting in mechanical motion.

b Advantages of Electromagnetism
Using electromagnetism instead of permanent magnets offers several advantages in electric motor design. Firstly, electromagnets provide greater control over the magnetic field strength and direction. By adjusting the amount of current flowing through the coil, the strength of the magnetic field can be varied, allowing for precise control of motor speed and torque. Additionally, electromagnets can be turned on and off by controlling the electric current, providing greater flexibility in motor operation.

b Permanent Magnet Motors
While electromagnetism provides flexibility and control, permanent magnets also have their advantages. Electric motors that use permanent magnets, known as permanent magnet motors, eliminate the need for an external power supply to generate the magnetic field. This can lead to higher efficiency and reduced energy consumption. Permanent magnet motors are often used in applications where size and weight are critical factors, such as in electric vehicles and portable devices.

b Conclusion
In summary, electric motors generate magnetic fields through the principle of electromagnetism. By passing an electric current through a coil of wire, an electromagnet is created, which interacts with the fixed magnetic field of the stator to produce mechanical motion. While some electric motors use permanent magnets, many others rely on electromagnetism for greater control and flexibility. The choice between permanent magnets and electromagnets depends on the specific requirements of the motor and its intended application.