Flashcards in Electromagnetic Induction Deck (18):
Faradays Laws of EMI
E= emf generated
δ= Magnetic flux
Magnetic flux δ=?
B= Magnetic field
δ= Magnetic Flux
State Lenz's Law
EMF generated opposes change in flux
Motional EMF E=?
E= Bvl= Bωl²/2=BAf
; f= frequency
l= length of conductor
ω= angular frequency
Induced current I=?
I= I₀ sin ωt
Coefficient of self induction δ=?
; L= coefficient of self induction
Self induction L of long solenoid =?
L= μ₀N²A/l= μ₀ n²Αl
; N= No of turns
n= Turn density
l=length of coil
A= Area of cross section of coil
Self inductance L of toroid =?
; A= Area of cross section of toroid
Energy E stored in an inductor =?
E= 1/2 Li^
; L = Inductance
Coefficient of mutual inductance δ=?
; M = coefficient of mutual inductance
In EMI , coefficient of coupling K=?
;L1,L2= Mutual inductance of respective coils
K= coefficient of coupling
Mutual inductance M of long coaxial solenoid =?
;N1,N2= No of turns on respective solenoids
l= length of solenoid
μ₀= permittivity of free space
Grouping of coils in series of M=0
; L= Self inductance
Grouping of coils in series if current in coils is in same direction
Grouping of coils in series if current is in opposite direction
Grouping of coils in parallel if current is in same direction in coils
Grouping of coils in parallel if current in coils is in opposite direction