Question regarding Faraday's law on induction

In summary, the law states that the induced electromotive force in a closed circuit is equal to the negative of the time rate of change of the magnetic flux enclosed by the circuit. When approaching a coil with two magnets on either side, if the magnets have the same polarity, the flux in the center will be zero. However, if the magnets have opposite polarities, the flux will increase and an EMF will be observed. This means that for the flux increase to have an effect, it must share a common polarity.
  • #1
Landru
107
1
The law states:

The induced electromotive force in any closed circuit is equal to the negative of the time rate of change of the magnetic fluxenclosed by the circuit.

So, what if the change is flux changes are proportionately equal parts of opposite polarities? Suppose you approach a coil with two magnets on either side of the coil, each set to repel each other's north or south faces; the flux increases, but in equal parts opposite polarity. What happens exactly?
 
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  • #2
Landru said:
The law states:
So, what if the change is flux changes are proportionately equal parts of opposite polarities? Suppose you approach a coil with two magnets on either side of the coil, each set to repel each other's north or south faces; the flux increases, but in equal parts opposite polarity. What happens exactly?
If the two magnets repel each others N or S poles, then they are the same polarity and the flux in the centre will be zero. If they are opposite, N and S, then the flux will increase as they are brought closer and an EMF will be observed.
 
  • #3
So what you're saying is that it's not enough that the flux increase, but that the flux increase must share a common polarity, and if they don't, they cancel as if there was no flux increase at all?
 

FAQ: Question regarding Faraday's law on induction

What is Faraday's law on induction?

Faraday's law on induction is a fundamental law of electromagnetism that states that a changing magnetic field can induce an electric current in a conductor.

How does Faraday's law work?

Faraday's law works by showing the relationship between a changing magnetic field and an induced electric current. When there is a change in the magnetic field, it creates a force that causes electrons to move, generating an electric current.

What is the importance of Faraday's law on induction?

Faraday's law is important because it explains the relationship between electricity and magnetism, and it is the basis for many modern technologies, such as generators, motors, and transformers.

How is Faraday's law used in everyday life?

Faraday's law is used in everyday life in various ways, such as in power plants to generate electricity, in household appliances like motors and transformers, and in technologies like wireless charging and induction cooktops.

Can Faraday's law be violated?

No, Faraday's law is a fundamental law of nature and has been proven through numerous experiments. It cannot be violated or disproven.

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