Summary A Level AQA Physics Magnetic Field revision notes

mic
Induction
Left Hand Rule Electromagnetic
Magnetism and
moving
Currents
Flemming's Lenz's law > the direction of the indu
field
-




As electrons
pass through a wire a
magnetic & INTO PAGE
-

the

I
change that causes
is created around the wire
b push into coil
↳ observed
by placing compasses neet to a magnet
shows that field
creates a
magnetic
wire with a current
flowing energy can never
a Direction of my o
South
be created or
destroyed that created it
Lines of force North &
Seeking
->




creates
Motor force
·
Induced current ->

m
coil field must act
again
Afcurrentcarryingwire ispladin-a
·




↳ otherwise it would br




entidian
& accelerate the
a
mag




S
↳ force acts perpendicular to North pole In-anticlock
the magnetic field lines
, North OUT -Clockwis
pole
to direction of
perpendicular was South pole IN -Clockwis
current flow
South pole OUT = anticloc




- force
The

to :
-Steer particles around circular path Magnetic fields UsingI
a motor in reverse

If motor forced to more
is zero when two are
parallel particles created to find
·
↳ current
analyse new
produce
-




· ↑ current = ↑ force out their new properties Using A
Namo- dyn

moving with velocity (v) through length (1)
particle ↳ in
↑magnetic = ↑ force F = BIL is
·



field in time (t) with Charge (a) FLEMING'S RIGHT HAND

of
·
↑ length wire
↑ force Magnetic Flucc
Density (
=
=

V Under what condition does F BQU
apply
=




inside magnetic field -
-





L =
v+ f Blut
=
↳ field (orB) must be at to P = BA =area