Faraday's Law Flashcards
1
Q
What is Faraday’s Law
A
The induced emf in a closed loop equals minus the rate of change of magnetic flux through the loop
ϵ =− dΦ_B/dt
2
Q
What is the flux through a surface?
A
Φ_B = ∬B⋅dS
3
Q
What is the direction of the emf?
A
Given by the opposite of the direction given by the right hand rule
4
Q
What is the emf for multiple coils?
A
ϵ =− NdΦ_B/dt
5
Q
What is Lenz’s law?
A
The effect of an induced emf is such that it opposes the changing flux which produced it
6
Q
What is the motional emf?
A
ϵ = ∮(v×B)⋅d ℓ
