Behavior of inductors -- Why flux linkage does not change instantaneously?

In summary, the flux linkage does not change instantaneously because of Lenz's Law and Faraday's Law, which are basic principles from Maxwell equations. Inductors resist changes in current by applying an opposite emf, which has nothing to do with the magnetic field itself. This phenomenon can be better understood by learning about these principles and how they relate to inductors.
  • #1
PumpkinCougar95
Why is it that the flux linkage does not change instantaneously ?
is it some property of magnetic fields?
 
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  • #2
PumpkinCougar95 said:
Why is it that the flux linkage does not change instantaneously ?
is it some property of magnetic fields?

what do you know about inductors when a current is applied to them and then what happens when the current is turned off ?
That will go a long way to answering your question

PumpkinCougar95 said:
is it some property of magnetic fields?

It's not a property of magnetic fields BUT it does have to do with what is happening with the magnetic field around the inductorDave
 
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  • #3
Well, the inductors resist any change in current by applying an opposite emf. But why do they resist ? Is it something like the magnetic field doesn't want to change immediately ?
 
  • #4
PumpkinCougar95 said:
Well, the inductors resist any change in current by applying an opposite emf. But why do they resist ? Is it something like the magnetic field doesn't want to change immediately ?

As Dave has stated, it has NOTHING to do with the magnetic field! You are chasing the wrong culprit.

It has everything to do with Lenz's Law and Faraday's law, i.e. basic E&M field from Maxwell equations. I am hoping that the mentioning of those concepts either will trigger your memory (if you've learned about them before), or direct you to do a search on those principles.

Zz.
 
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1. What is an inductor and how does it work?

An inductor is an electronic component that is designed to store energy in the form of a magnetic field. It consists of a coil of wire that can be wound around a core made of a ferromagnetic material. When an electric current flows through the coil, a magnetic field is created. The inductor resists changes in the current by storing energy in the magnetic field.

2. Why does the flux linkage in an inductor not change instantaneously?

Flux linkage is a measure of the amount of magnetic flux that is linked with the inductor. In an inductor, the magnetic flux is created by the flow of current through the coil. However, due to the inductance of the coil, the magnetic field takes time to build up and reach its maximum strength. Therefore, the flux linkage does not change instantaneously.

3. How does the inductance of an inductor affect its behavior?

The inductance of an inductor is a measure of its ability to store energy in the form of a magnetic field. The higher the inductance, the more energy an inductor can store. This affects the behavior of an inductor by determining how quickly the magnetic field can build up and how much energy it can store.

4. What is the time constant of an inductor and how is it related to flux linkage?

The time constant of an inductor is a measure of how quickly the magnetic field can build up or decay. It is calculated by dividing the inductance by the resistance of the coil. The time constant is directly related to flux linkage, as a longer time constant means that the flux linkage will change more gradually.

5. What are some practical applications of inductors?

Inductors are widely used in electronic circuits for a variety of purposes. Some common applications include power supply filtering, motor control, signal processing, and energy storage. They are also used in devices such as transformers, sensors, and electrical filters.

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