Magnetic fields Flashcards
1
Q
The radius of the circular path followed by charged particles
A
r = mv/BQ
2
Q
Frequency of rotation
A
f = v/2πr
3
Q
Frequency of rotation pt.2
A
f = v/2πr and r = mv/BQ f = v/2π(mv/BQ) f = BQ/2πm
4
Q
θ = ωt
A
Nψ = BANcos ωt
5
Q
Average power
A
Irms x Vrms
6
Q
Primary coil
A
Vp = Np
7
Q
Lenzs law
A
The induced EMF is always in such a direction as to oppose the change that caused it
8
Q
Faradays law
A
Induced EMF is directly proportional to the rate of change of flux linkage
9
Q
Define Magnetic Flux Density
A
The force on one meter of wire carrying a current of one amp at right angles to the magnetic field
