Electromagnetism : Use of electromagnet.

In this world,electromagnets are everywhere from our own use at home and some heavy duty work at industry. Electromagnet change the world where we live now. No electromagnet means No technology. So now lets see use of electromagnetism.

1) An Electric Bell

 An electric bell consist two electromagnet with wounded solenoids in the opposite direction. When the switch press,a current flows through the solenoids and the electromagnet will energize. This will attract the soft iron armature. When the movement of soft iron armature break the contact,the circuit is off. And the cycles repeat by energizing the solenoids by giving Ding!!! Dong!!! Ding!! Dong!!! sound.

2) Telephone Earpiece

 Inside a telephone earpiece,two electromagnets are fixed with permanent magnet. When the current of varying the magnitude passes through the solenoids,the strength of the electromagnet changes. The diaphragm is pulled by the electromagnets with change the force.Hence the diaphragm vibrates and a sound of similar frequency as received by earpiece.

3) Electromagnet In Industrial Use

 This huge electromagnet are use in cranes to lift heavy and craft metals. This electromagnet can lift ferromagnetic materials like iron,steel,cobalt and Nickel. It's also separate non-ferromagnetic like copper,aluminium and lead. It's work similar to home made electromagnet,but this need huge amount of current to produce huge electromagnetic field.

4) MRI (Magnetic Resonance Imaging) Machine

 Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to make pictures of organs and structures inside the body.