Magnetic fields Flashcards
1
Q
What is the force on a charged particle in a magnetic field?
A
F=qvxB
2
Q
What is the Lorentz force?
A
The force on a charged particle moving through a magnetic and electric field
F=q(E+vxB)
3
Q
What is the magnetic flux?
A
A measure of the flow of the magnetic field through a surface
Φ_B = ∬B⋅dS
⃗
4
Q
What are the properties of magnetic field lines?
A
They do not start or end at points
They are always closed
5
Q
What is the solenoidal condition?
A
All magnetic flux entering a closed volume must also leave that volume
◯∬B⋅dS=0
6
Q
What is the Larmor radius?
A
The radius of a charged particle in a magnetic field
R_L=mv/qB
With v the perpendicular velocity
The parallel speed is constant
7
Q
What is the work done for a charged particle in a magnetic field?
A
zero
