, Electromagnetism
field region in space where a magnet experiences a force
magnetic a
·
:
↳
exists around permanent magnets or current-carrying conductors
Fields lines
are shown
by using
↳
density-strength
> direction = force of mfield
-
·
magnetic domain : small groups of atoms with the same magnetic orientation
↳
ferromagnetic substances are magnetised when these
align in a strong external field
Magnetic Fields from Current
Right-hand rule :
0000
-o
4
Thumb : direction of current (1) 11
↳ curling fingers : direction of mag .
Field (B)
Straight conductor
7
>
⑨ - -
M &
current goes toward you
[
&
L
[
X &
from
current goes away
-
- &
you
&
Y
Single Loop Conductor
N T
N
L 7
[ >
- - X &
M &
⑨ - -
makes similar field to bor magnet
&
N M
& [
Y S &
Solenoid (multi-loop conductor)
git
* FLIP RAR Where B =
thumb & I =
Fingers
u current
-
mu
magnetic field
#
field region in space where a magnet experiences a force
magnetic a
·
:
↳
exists around permanent magnets or current-carrying conductors
Fields lines
are shown
by using
↳
density-strength
> direction = force of mfield
-
·
magnetic domain : small groups of atoms with the same magnetic orientation
↳
ferromagnetic substances are magnetised when these
align in a strong external field
Magnetic Fields from Current
Right-hand rule :
0000
-o
4
Thumb : direction of current (1) 11
↳ curling fingers : direction of mag .
Field (B)
Straight conductor
7
>
⑨ - -
M &
current goes toward you
[
&
L
[
X &
from
current goes away
-
- &
you
&
Y
Single Loop Conductor
N T
N
L 7
[ >
- - X &
M &
⑨ - -
makes similar field to bor magnet
&
N M
& [
Y S &
Solenoid (multi-loop conductor)
git
* FLIP RAR Where B =
thumb & I =
Fingers
u current
-
mu
magnetic field
#
