Electromagnetic induction occures when--- HOW?
Electromagnetic induction occurs when there is a change in the magnetic field around a conductor, resulting in the generation of an electric current within the conductor. The change in magnetic field can occur due to a variety of reasons, such as relative motion between a magnet and a conductor, changes in current flow within a nearby conductor, or changes in the magnetic field due to a fluctuating electric current. The electric current generated by electromagnetic induction can be harnessed and used for various applications, such as power generation, electric motors, and transformers.
A CONDUCTOR IS MOVED THROUGH A MAGNETIC FIELD IS WHEN INDUCTION OCCURES.
Yes, when a conductor is moved through a magnetic field, electromagnetic induction occurs. The magnetic field induces an electric current in the conductor, which flows in a direction perpendicular to both the magnetic field and the direction of motion of the conductor. This phenomenon is known as motional or dynamic electromagnetic induction, and it can be observed in devices such as electric generators and electric motors. The greater the speed of the conductor through the magnetic field or the stronger the magnetic field, the greater the induced electric current.
Electromagnetic induction occurs when there is a change in the magnetic field strength or orientation near a conductor, which in turn induces an electric current to flow through the conductor. This phenomenon was discovered by Michael Faraday in the early 19th century.
To further understand how electromagnetic induction occurs, let's break down the process:
1. Magnetic Field: First, you need a magnetic field. This can be created by a permanent magnet or an electromagnet. The magnetic field consists of lines of force that extend from the north pole to the south pole.
2. Conductor: A conductor is a material that allows electric charges to flow freely. Examples of conductors include copper, aluminum, and iron. It's crucial to have a conductor within the vicinity of the magnetic field for induction to happen.
3. Relative Motion: Now, to induce an electric current, there must be a relative motion between the conductor and the magnetic field. This can occur in two ways:
a. Moving Conductor: The conductor can move across the magnetic field lines. For example, if you move a copper wire through a magnetic field, the motion of the wire across the lines of force induces an electric current. This is known as "motion-based electromagnetic induction."
b. Changing Magnetic Field: Alternatively, you can keep the conductor stationary and change the strength or orientation of the magnetic field. For instance, if you move a permanent magnet toward or away from a stationary copper wire, the changing magnetic field induces an electric current. This is referred to as "field-based electromagnetic induction."
4. Faraday's Law: The induced electric current, according to Faraday's law of electromagnetic induction, is directly proportional to the rate of change of the magnetic field or the rate at which the conductor cuts across the magnetic field lines. Greater motion or faster changes in the magnetic field result in a stronger induced current.
In summary, electromagnetic induction occurs when there's a change in the magnetic field strength or orientation near a conductor. This change induces an electric current to flow through the conductor.