"An induced current is always in such a direction as to oppose the motion or change causing it"
Faraday's law of induction indicates that the induced electromotive force (emf) and the change in flux have opposite signs, and it also gives the direction of the induced (emf) and current resulting from electromagnetic induction.
Change of mechanical energy to electrical energy.
Demonstration of the principle and laws of electromagnetic induction.
Application in generators
The electrical Genny, or Generator