Question

state four practical applications of electromaganets.

Answer 1

In many practical applications of electromagnets, such as motors, generators, transformers, lifting magnets, and loudspeakers, the iron core is in the form of a loop or magnetic circuit, possibly broken by a few narrow air gaps.

Answer 2

Applications of Electromagnetism

SEPTEMBER 19, 2015 BY ADMINISTRATOR 15 COMMENTS

A branch of physics deals with electric current or fields and magnetic fields and their interaction on substance or matter is called Electromagnetism. Electromagnetism has created a great revolution in the field of engineering applications. In addition, this caused a great impact on various fields such as medical, industrial, space, etc.

We can find enormous practical application of electromagnetism in everyday life from domestic appliances to research applications.

In domestic applications we can observe the phenomena in lighting, heating and kitchen appliances  , in communication systems this exist in all telecommunication equipments and communication networks , in industrial systems this can be applied in motors, generators, sensor and actuator devices, etc.

If a current carrying conductor wound on a high permeability core (or iron core) creates an electromagnet. If this electromagnet is excited with a source of supply, then the magnetic field is produced. The strength of the magnetic flux depends on the current flowing through the electromagnet and the number of turns wounded on it.

Although all current carrying conductors produce magnetic fields, an electromagnet is specially constructed to maximize the strength of the magnetic field for a specific function.

The magnetic fields produced by electromagnets used for special functioning of the devices. Such devices include transformers, relays, motors, etc. In transformer the magnetic field produced causes the emf to generate in secondary coil such that voltage transfer is carried between two magnetically coupled circuits.

In case of relays, the magnetic field produced caused the plunger movement so that contacts get closed or opened and in motors this field causes the motor to rotate in a specific direction. Therefore, the usage of electromagnetism is wide and everywhere. So let us discuss some of the application areas where electromagnetism is used.