Applications of Electromagnets

Applications of Electromagnets

Electromagnetism has created a great revolution in the field of engineering applications. In addition, this has caused a great impact on various fields such as medicine, industries, space etc.

1. Speaker

Inside the speaker, the electromagnet is placed in front of a permanent magnet. The permanent magnet is xed rmly in position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. is means that it is in turn attracted to and repelled from the permanent magnet vibrating back and forth. The electromagnet is attached to a cone made of a exible material such as paper or plastic which ampli es these vibrations, pumping sound waves into the surrounding air towards our ears.

2. Magnetic Levitation Trains

Magnetic levitation (Maglev) is a method by which an object is suspended with no support other than magnetic fields. In maglev trains two sets of magnets are used, one set to repel and push the train up off the track, then another set to move the floating train ahead at great speed without friction. In this technology, there is no moving part. The train travels along a guideway of magnets which controls the train’s stability and speed using the basic principles of magnets.

3. Medical System

Nowadays electromagnetic fields play a key role in advanced medical equipments such as hyperthermia treatments for cancer, implants and magnetic resonance imaging (MRI). In a, sophisticated equipments working based on the electromagnetism can scan minute details of the human body.

Many of the medical equipments such as scanners, x-ray equipments and other equipments also use principle of electromagnetism for their functioning.