Electromagnet -

Most people think of magnets as the static clips on a refrigerator, but the world actually runs on a much more dynamic version: the . Unlike permanent magnets, which have a fixed magnetic field, electromagnets can be turned on and off, adjusted in strength, and even reversed with the flick of a switch.

Found in everything from blenders to Tesla S models, motors use electromagnets to convert electrical energy into mechanical motion.

18;write_to_target_document1b;_Znb8ab2rPKiSwPAP5tb_-AM_100;57; 0;b30;0;698; 0;624;0;6d2; 0;26c;0;7e9; 18;write_to_target_document7;default0;1a4; 0;36c9;0;71; electromagnet

The iron core inside the coil acts as an "amplifier." Iron is highly permeable, meaning it provides an easy path for the magnetic lines of flux to travel through. This can make the magnet hundreds or thousands of times stronger than the coil alone. 0;7a;0;a5; Factors That Affect Magnetic Strength

Increasing the voltage or amperage flowing through the wire increases the magnetic pull. Most people think of magnets as the static

The physics behind it is governed by . When electrons flow through a wire, they create a small magnetic field around it. By winding that wire into a tight coil (called a solenoid ), those individual magnetic fields stack up and combine into one strong, focused field.

18;write_to_target_document1a;_Znb8ab2rPKiSwPAP5tb_-AM_20;6; The physics behind it is governed by

"Maglev" stands for magnetic levitation. These trains use powerful electromagnets to float above the tracks, eliminating friction. This allows them to reach speeds of over 300 mph (480 km/h) with a remarkably smooth ride. 3. Medical Imaging (MRI)