What is an electromagnet?How is it different from a permanent magnet?State two uses of electromagnet.
What is an electromagnet?How is it different from a permanent magnet?State two uses of electromagnet.
An electromagnet is a kind of magnet whose magnetic field is created by the flow of electric current. The magnetic field disappears when the current stops. Electromagnets offer the advantages of controlled holding power and on command release. Through the application of controlled DC electrical current, electromagnets have the ability to attract and hold ferrous materials with varying degrees of force, and to release the item as required. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. As the name suggests, a permanent magnet is 'permanent'. This means that it always has a magnetic field and will display a magnetic behavior at all times.
An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it. Often an electromagnet is wrapped around a core of ferromagnetic material like steel, which enhances the magnetic field produced by the coil.
The strength, ability and versatility of electromagnets have rapidly evolved over the past few decades. Electromagnets are a significant element in several industrial processes, and have played a leading role in the development of the assembly line in modern factories. Electromagnets are used in many electric device applications, including:
- Electric bells
- Industrial lifting magnets
- Loudspeakers
- Magnetic locks
- Magnetic recording and data storage equipment
- Magnetic separation of materials
- Motors and generators
- Relays
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. As the name suggests, a permanent magnet is 'permanent'. This means that it always has a magnetic field and will display a magnetic behavior at all times.
An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it. Often an electromagnet is wrapped around a core of ferromagnetic material like steel, which enhances the magnetic field produced by the coil.
The strength, ability and versatility of electromagnets have rapidly evolved over the past few decades. Electromagnets are a significant element in several industrial processes, and have played a leading role in the development of the assembly line in modern factories. Electromagnets are used in many electric device applications, including:
- Electric bells
- Industrial lifting magnets
- Loudspeakers
- Magnetic locks
- Magnetic recording and data storage equipment
- Magnetic separation of materials
- Motors and generators
- Relays
