What are the advantages of using an electromagnet?

Electromagnets offer several advantages, including the ability to easily control their magnetic strength and polarity by adjusting the electric current, making them versatile for various applications. They can be turned on and off, providing precise control in devices like motors and relays. Additionally, electromagnets can be designed to produce strong magnetic fields in a relatively compact size compared to permanent magnets, enhancing their effectiveness in applications such as magnetic resonance imaging (MRI) and industrial machinery.