821.1 Faraday's law of electromagnetic induction enz’slaw Is there a easy way to determine the direction of the induced current or emf? The induced current will always be directed so as to oppose the change in the magnetic flux that is taking place. mf em s 21.1 Faraday's law of electromagnetic induction Emf arising from moving conductor Equilibrium state: B f △V 4 vB=gE=q △V=B Lorentz force is the nonstaticelectric force qν×BE v×B q5 Lenz’s law Is there a easy way to determine the direction of the induced current or emf? The induced current will always be directed so as to oppose the change in the magnetic flux that is taking place. §21.1 Faraday’s law of electromagnetic induction emf emf + + ①Emf arising from moving conductor mf l + − e f d c v r → B r ⊕ × ∆U × × × × × × × × × × × ∆V = Blv Fm = Fe l V qvB qE q ∆ = = Equilibrium state: Lorentz force is the nonstaticelectric force. FK Fm qv B r r r r = = × v B q F E m K r r r r = = × §21.1 Faraday’s law of electromagnetic induction