This lesson is on Electromagnetic Induction and emf through Faraday’s Law and Lenz’s Law, which is part of Unit 3 Area of Study 2 for VCE Physics.
Electromagnetic induction is a fundamental concept in Physics that explains how a change in a magnetic field can generate an electric current. It was first discovered by Michael Faraday and is described by Faraday’s Law.
Faraday’s Law states that the electromotive force (emf) induced in a coil of wire is proportional to the rate of change of magnetic flux through the coil. This can be mathematically represented as emf = -dΦ/dt, where Φ is the magnetic flux.
Lenz’s Law, also known as the law of conservation of energy, is closely related to Faraday’s Law and describes the direction of the induced current.
The law states that the direction of the induced current is such that it opposes the change that produced it. In other words, the induced current will work to maintain the original magnetic field and prevent it from changing.
In summary, Faraday’s and Lenz’s Laws provide a complete description of the process of electromagnetic induction and the induced current that results from a change in a magnetic field. These laws have important practical applications in fields such as electrical engineering and electronics.
They form the basis for technologies such as transformers, generators, and motors, which are used extensively in our daily lives.
Faraday’s Law of electromagnetic induction, magnetic flux, and induced EMF
Faraday’s and Lenz’s Law of electromagnetic induction, induced EMF, magnetic flux and transformers
Practice Problems
This video will take you through practice problems for Faraday’s Law.
This video will take you through practice problems for Lenz’s Law.
Looking for more resources to help you understand Unit 3 Area of Study 2? Check out more of our VCE Physics resources here!
