Magnetism

A ferromagnetic material is a material that can be ___.

magnetized

ferromagnetic materials have ____

electrons

In ferromagnetic materials the ___ of electrons line up in small regions

spin

what is a domain

small region where electron spins up

like poles __

repel

unlike poles

attract

Both north and south poles of a magnet attract ___ ferromagnetic materials. This happens because the magnet ___ domains in the non-magnetized ferromagnetic material.

non-magnetized, temporarily aligns

A magnetic field is a line of___ around a permanent or temporary magnet.

magnetic influence

The direction of the magnetic field is defined: the direction in which a ___ will point when placed in the magnetic field

compass needle

The direction of the magnetic field is defined:

from north to south

parallel lines indicate a ___

uniform field

non parallel lines indicate a ___

non-uniform field

External magnetic field direction

point out of north points into south

Earth is not truly a magnetic “North Pole”, rather it is

actually a magnetic “____”.

South Pole

direction of magnetic field by an electron or current: left thumb points to the direction of ___ movement and fist is the resulting ___

current/electron, magnetic field

if its moving through a ___, then to find the direction of the magnetic field, your thumb will automatically point in the direction of the __ , and your clenched fingers point in the direction of __

magnetic field ( south to north ), current

we usually use ___ hand for the coil grasp rule for conventional current

right

in coil grasp rule your fingers will end up pointing to the __ pole

north

positively charged particle is exposed to an external electric field, a ____ is exerted on the particle in ___ direction of the external field.

force, same

negatively charged particle is exposed to an external electric field, a ____ is exerted on the particle in ___ direction of the external field.

force, opposite

a charged particle will not be deflected by an external field unless ___

its in motion

deflection rules: fingers point

magnetic field (towards South Pole)

deflection rules palm points

force

deflection rules thumb points

direction of travel

If the particle is moving parallel to the field,

the magnetic forces is

zero

A charged particle moving through a uniform external magnetic field will travel in a certain path until it exits the uniform magnetic field. Because it travels in a ___, there is a ___ force, which is caused by the magnetic force.

circle, centripetal

Faraday discovered that when a wire is moved relative to a magnet (or vice versa), or a wire is exposed to a changing magnetic field, then a

___ and an ____ is induced in the wire.

potential difference, electric current

thumb for electrons/wire movement , fingers magnetic field (from North to South), palm will point in the direction of the ___ which is also the

direction of the___ in the wire.

magnetic force, current