Magnetism Flashcards
Magnitude is related to the ratio of …
Force to the product of charge and velocity
Vectors point from
North pole to south pole
What creates magnetic fields within materials
Electrons
Paired electrons result in ______ spin
Cancelled
What is a magnetic domain
Regions of atoms with aligned spins
Domains usually ________
, but can be________ by an external magnetic field in some substances.
Cancel, alligned
Magnitude depends on
Current and distance from wire
A particle will experience a force in a magnetic field if it is….
Charged, moving, and not parallel to field
Magnetic Field
a region of space surrounding a magnetic material or a moving charge that exerts a force on other moving charges
Solenoid
a coil of wire wrapped around a central axis with a very strong magnetic field inside the coil
Magnetic Flux
the amount of magnetic field that passes through a certain area
Electromagnetic Induction
the creation of voltage and current in a closed loop of wire due to a change in
magnetic flux through the loop
Lenz’s Law
An induced voltage always gives rise to a current whose magnetic field opposes the original
change in magnetic flux. Lenz’s Law is a technique used to determine the direction of induced current.
Photoelectric Effect
when a light of a certain frequency shines on a piece of metal, electrons are emitted
Photon
particle of light
