Inductor leading lagging voltage-current

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In summary, the voltage in an AC circuit leads the current due to the behavior of the inductor. The voltage is proportional to the derivative of the current, causing a delay in the current's response to changes in voltage. This phenomenon is explained by the principles of Lenz's law and can be further understood by considering the concept of a derivative in math.
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superslow991
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Trying to understand how in a conductor in an Ac circuit, the voltage leads the current.
AS far as i read the voltage and the current max do not peak at the same time? Also because of lenz law the behavior of the coil resist the build up of the current so it takes time for a change in voltage to force a change in current?
Any explanation will help.
 
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  • #2
superslow991 said:
Trying to understand how in a conductor in an Ac circuit, the voltage leads the current.
AS far as i read the voltage and the current max do not peak at the same time? Also because of lenz law the behavior of the coil resist the build up of the current so it takes time for a change in voltage to force a change in current?
Any explanation will help.

what education level are you ... you listed your thread as I for intermediate but your question indicates basic
... just so people can give you a good and relevant answer

for a start you can do some reading, there is tons of info online

http://www.bing.com/search?q=Induct...opResult&FORM=IETR02&conversationid=&pc=EUPP_Dave
 
  • #3
Did you by any chance mean "inductor" when you wrote conductor?

To actually answer your question, I must ask whether you know what a derivative is in math. Because what actually happens in an inductor/coil is that the voltage is proportional to the derivative of the current. Or stated the other way around, the current is proportional to the integral of the voltage.

That of course means, yes, the current "follows sluggishly" to the changes of an external voltage. Interestingly, it also means that cutting the wire in a circuit like that causes an huge voltage because the current is suddenly forced to zero, and the derivative of that sudden drop is very large.
 
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1. What is an inductor?

An inductor is a passive electronic component that stores energy in the form of a magnetic field. It consists of a coil of wire, typically made of copper, wrapped around a core material such as iron or ferrite.

2. What is the relationship between inductor voltage and current?

The voltage across an inductor is directly proportional to the rate of change of current through it. In other words, as the current through an inductor increases, the voltage across it also increases, and vice versa.

3. What is meant by inductor leading and lagging voltage-current?

Inductor leading and lagging refer to the phase relationship between the voltage and current in an AC circuit. When the voltage across an inductor leads the current, it is said to be inductive leading. When the voltage lags behind the current, it is inductive lagging.

4. How does an inductor affect the power factor of a circuit?

Inductors have a reactive component that can cause the voltage and current to be out of phase, leading to a lower power factor. This means that the apparent power (VA) in the circuit is greater than the real power (W), resulting in a less efficient use of electrical energy.

5. How can inductor leading or lagging be corrected?

Inductor leading or lagging can be corrected by using a capacitor in parallel with the inductor. This forms a series resonant circuit that can cancel out the reactive effects of the inductor, resulting in a higher power factor and more efficient use of electrical energy.

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