Week 9 Faraday's Law Flashcards
why does a battery do work
to separate charge
what is the battery work equation
W = ∫F dl
what is the EMF equation
EMF = ε = ∫f dl
f is the force per unit charge
when does motional EMF occur
when there is a non-zero velocity difference between the magnetic field and the object under consideration
what is the motional EMF equation
ε = vBL
L is inductance
what does Faraday’s law state
tells us that a changing E field produces a B field
and that the reverse is true
what is the magnetic flux equation
φ = ∫B ds = BLx
what is Lenz law equation
ε = -dφ/dt
what is the EMF generated by a rotating disk equation
ε = 1/2 ωBR^2 = ∫ωBr dr
what is the magnetic flux EMF relation
a changing magnetic flux leads to an EMF that opposes the change
what is Lenz law
The direction of the induced EMF is such that the induced current creates a magnetic field that opposes the change in flux
what is EMF
work done per unit charge
when are E field conservative
when ∫E dl = 0
