RAD 262 Ch. 7
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/38
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
39 Terms
magnetism
ability of certain materials to attract iron, cobalt, or nickel
magnet
something that attracts iron, cobalt, or nickel
electromagnet
temporary magnet provided by electric current
natural magnet
became magnetized by laying in magnetic field of earth for thousands of years
artificial permanent magnet
hard steel in shape of bar or horseshoe that has been artificially magnetized
example of natural magnet
earth or loadstone
law of magnetism
like magnetic poles repel, unlike poles attract
what happens if you break a magnet?
each piece becomes a mini magnet
what happens if you heat or hammer steel while its laying near a magnet?
steel will become magnetized
what happens if you stroke an iron bar with a magnet?
iron becomes magnetized
what happens if you jar iron filings near a magnet?
iron filing will become magnetized
what makes an atom a magnetic element?
more e- in orbit spinning one way than the other
what happens if there is the same number of e- flowing in both directions?
atom cannot be magnetized (non-magnetic)
non magnetized
the domains are in a random configuration
magnetized
domains are lined up in orderly way
magnetic moment/dipole
atom has more e- spinning in one direction than the other
magnetic field
zone of influence surrounding every magnet
other names for magnetic field lines
magnetic lines of force, magnetic lines of flux
magnetic field strength
proportional to the number of lines per square cm
what direction does the lines of force on the outside of the magnet move
north to south
what direction does the lines of force on the inside of the magnet move
south to north
what happens if 2 lines of force are moving in the same direction
they repel each other
what happens if 2 lines of force are moving in opposite directions
they attract each other
what distorts magnetic lines of force
magnetic material
what does not affect magnetic lines of force
non-magnetic material
magnetic induction
how we get a magnetic element from the non-magnetized to the magnetized state
what happens if the permanent magnet is removed
domain becomes randomized again
if we have a magnetic element in a non-magnetized state and we brine it near one pole of a permanent magnet, what happens
the domains line up and the side of the magnetic element closest to the pole assumes the opposite polarity
permeability
ease of which a material can be magnetized
retentivity
ability of a magnet to resist de-magnetization
how are permeability and retentivity related
oppositely related
ferromagnetic
strongly attracted by a magnet
examples of ferromagnetic
iron, cobalt, nickel
paramagnetic
weakly attracted by a magnet
example of paramagnetic
platinum
nonmagnetic
not attracted by a magnet
examples of non-magnetic
wood, glass, and plastic
diamagnetic
repelled by a magnet
examples of diamagnetic
beryllium and bismuth