Faraday Law Formula
Faraday Law formula can be easily calculated as suppose we take a bar magnet approaching a coil and we measure the flux associated with the coil at two-time instances T1 and T2. The change in flux results in the production of EMF which causes electrons to move to constitute current.
The image given below tells us about the change in electromagnetic force linked with the coil when the magnet moved close to the coil.
At T1, the flux associated with the coil = Nϕ1
At T2, the flux associated with the coil = Nϕ2
Change in flux = N(ϕ1 – ϕ2) = Nϕ
Rate of change of flux = Nϕ/t
Taking the derivative, and equating it with E(electromotive force), according to Faraday’s law of electromagnetic induction, the rate of change of flux is equal to induced emf.
E = Ndϕ/dt
Considering Lenz’s Law the emf opposes the cause which produces it,
E = -Ndϕ/dt
where,
E is the electromotive force
Φ is the flux measured in the coil
N is the number of turns in the coil
Faraday’s Laws of Electromagnetic Induction
Faraday’s Law of Electromagnetic Induction is the basic law of electromagnetism that is used to explain the working of various equipment that includes an electric motor, electric generator, etc. Faraday’s law was given by an English scientist Michael Faraday in 1831. According to Faraday’s Law of Electromagnetic Induction, the induced current in the circuit is directly proportional to the rate of change of Magnetic Flux.
Let’s learn about Faraday’s Law of Electromagnetic Induction, its experiment, derivation, examples, and others in detail in this article.