Chapter 17 Electromagnetic Induction Flashcards
(5 cards)
1
Q
Magnetic flux
A
Product of component of magnetic flux density normal to the surface and area of the surface
Φ = BAcosθ
θ: angle between B and normal to plane
2
Q
Magnetic flux linkage
A
Product of magnetic flux through a loop and the number of turns of wire in the loop
NΦ = NBAcosθ
3
Q
Faraday’s law
A
Magnitude of induced emf is directly proportional to rate of change of magnetic flux linkage
4
Q
Lenz’s law
A
EMF is induced in the direction such as to oppose the change in magnetic flux inducing it.
5
Q
Purpose of lamination
A
To reduce effect of eddy currents by limiting amount of eddy current generated
