what is the difference between electromagnetic induction and electromagnetism? are they closely connected?
Electromagnetism is creating a magnetic field from a electric current. Induction is transfering from that created magnetic field a current in a secondary wire.
Electromagnetic induction and electromagnetism are closely connected but they refer to different aspects of the same phenomenon.
Electromagnetism is a fundamental branch of physics that studies the interaction between electrically charged particles and the motion of electric charges. It encompasses the study of electric fields, magnetic fields, and how they are related.
On the other hand, electromagnetic induction is the process by which a changing magnetic field induces an electric current in a conductor. When there is relative motion between a magnetic field and a conductor, or when the magnetic field itself changes, it creates a varying magnetic flux. This changing magnetic flux induces an electromotive force (EMF) or voltage in the conductor, according to Faraday's law of electromagnetic induction.
In simpler terms, electromagnetic induction is the phenomenon of producing an electric current or voltage in a conductor by changing the magnetic field around it. This effect is the basis for many technological applications, such as generators, transformers, and electromagnetic devices.
So, while electromagnetism refers to the broader study of electric and magnetic fields, electromagnetic induction specifically focuses on the process of inducing an electric current by changing magnetic fields. They are closely connected because electromagnetic induction is a consequence of the fundamental principles of electromagnetism.
Electromagnetic induction and electromagnetism are closely connected but refer to different aspects of the same phenomenon.
Electromagnetism is a branch of physics that studies the relationship between electricity and magnetism. It describes how electric currents and moving charges create magnetic fields, and how magnetic fields in turn can induce electric currents. In other words, it is the study of the interaction between electric and magnetic fields.
On the other hand, electromagnetic induction refers specifically to the process of generating an electric current in a conductor by varying the magnetic field around it. This phenomenon was first discovered by Michael Faraday in the early 19th century.
To understand the difference, let's consider an example. If you have a wire carrying an electric current, it produces a magnetic field around it due to electromagnetism. This magnetic field can induce a current in a second wire placed nearby, without any direct physical connection between the two wires. This is an example of electromagnetic induction.
So, electromagnetism is the broader concept that encompasses the relationship between electricity and magnetism. Electromagnetic induction, on the other hand, is a specific process that falls under the umbrella of electromagnetism, involving the generation of electric currents through changes in magnetic fields.
In summary, electromagnetism deals with the fundamental properties and interactions of electric and magnetic fields, whereas electromagnetic induction is a specific application of those principles, focusing specifically on the generation of electric currents through changing magnetic fields.