What Are Electromagnets?

Electromagnets are versatile tools used in various applications, from medical imaging to data storage. They are created by running an electric current through a coil of wire, which generates a magnetic field. The strength of an electromagnet can be increased by adding more coils, inserting an iron core, or increasing the current. The ability to switch the magnetic field on and off makes electromagnets highly useful in science and industry.

What is the significance of being able to turn an electromagnet on or off?

Describe the relationship between electricity and magnetism as mentioned in the text.