magnetism

Question 1

field lines

Answer 1

by convention go from north to south

Question 2

magnetization

Answer 2

iron can be magnetized by rubbing it against magnetized iron - this aligns the spin of electrons

Question 3

demagnetization

Answer 3

hammering or heating

Question 4

soft metal

Answer 4

like iron - easy to magnetize and demagnetize

Question 5

hard metal

Answer 5

like cobalt and nickel - hard to magnetize and demagnetize

Question 6

magnetic field

Answer 6

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

Question 7

magnetic field sign conventions

Answer 7

➡️ - in the plane of the page
✖️- into the page
⏺ - out of the page

Question 8

right hand rule (first one)

Answer 8

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

Question 9

electron pairs

Answer 9

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)

Question 10

ferromagnetic

Answer 10

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)

Question 11

domains

Answer 11

a microscopic magnetic region composed of a group of attacks ms whose magnetic fields are aligned in a common direction

Question 12

randomly aligned atoms

Answer 12

unmagnetized

Question 13

solenoid

Answer 13

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.

Question 14

stationary charge

Answer 14

doesn’t interact with a magnetic field

Question 15

moving charge through a field

Answer 15

experiences a magnetic force - strongest when moving perpendicular to the field and zero when moving parallel to the field

Question 16

1 Tesla

Answer 16

one Coulomb charge moving at 1 m/s perpendicular to a field receive 1 N of force

Question 17

right hand rule (2nd one)

Answer 17

direction of magnetic force is always perpendicular to both velocity and magnetic field

Question 18

RHR fingers point

Answer 18

direction of B

Question 19

RHR thumb points

Answer 19

direction of v

Question 20

RHR palm

Answer 20

Fmag is directed out of palm