Electromagnetic Induction Flashcards
chapter 17 (5 cards)
1
Q
Define magnetic flux
A
Magnetic flux through a plane surface is the product of the component of the magnetic flux density normal to the surface and the area of the surface.
(flux = BA)
2
Q
Define magnetic flux linkage
A
Magnetic flux linkage through a loop is the product of the magnetic flux through the loop and the number of turns of the wire in the loop.
(flux linkage = N x flux = NBA )
2
Q
Faraday’s Law
A
Faraday’s Law states that the magnitude of the emf induced is directly proportional to rate of change of magnetic flux linkage.
3
Q
Lenz’s Law
A
Lenz’s Law states that the emf is induced in the direction such as to oppose the change in the flux linkage that is inducing it.
3
Q
emf equations
A
ℰ = BLv
ℰ = (1/2) Br²ω
