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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

RHR palm

Fmag is directed out of palm