Flashcards in magnetism Deck (20)
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1
field lines
by convention go from north to south
2
magnetization
iron can be magnetized by rubbing it against magnetized iron - this aligns the spin of electrons
3
demagnetization
hammering or heating
4
soft metal
like iron - easy to magnetize and demagnetize
5
hard metal
like cobalt and nickel - hard to magnetize and demagnetize
6
magnetic field
vector quantity - region in which a magnetic force can be detected - direction is direction in ah oh north pole of compass needle points when in a magnetic field
7
magnetic field sign conventions
➡️ - in the plane of the page
✖️- into the page
⏺ - out of the page
8
right hand rule (first one)
if a wire carrying a current is grasped in the right hand with the thumb in the direction of the current, the fingers will curl in the direction of the magnetic field
9
electron pairs
electrons are said to have spins of up and down - if any electron is paired with another of opposite spin then the magnetic fields cancel if they aren't magnetic (ex: wood, plastic)
10
ferromagnetic
if the electrons aren't paired (as in nickel, iron, or cobalt), the spins are not cancelled and they are magnetic or labeled ferromagnetic (strong susceptibility to magnetism)
11
domains
a microscopic magnetic region composed of a group of attacks ms whose magnetic fields are aligned in a common direction
12
randomly aligned atoms
unmagnetized
13
solenoid
tightly wound coils of wire making a hollow tube. when a current is applied to the coils a magnetic field results. string current, stringer field. field inside is stronger than field outside.
14
stationary charge
doesn't interact with a magnetic field
15
moving charge through a field
experiences a magnetic force - strongest when moving perpendicular to the field and zero when moving parallel to the field
16
1 Tesla
one Coulomb charge moving at 1 m/s perpendicular to a field receive 1 N of force
17
right hand rule (2nd one)
direction of magnetic force is always perpendicular to both velocity and magnetic field
18
RHR fingers point
direction of B
19
RHR thumb points
direction of v
20
