on 18 ?
Domain 5: Electric Fields
and
Magnetic
Electric Fields -
charge creats a force Lorentz Force
around it ↳ If both
electrical and fields act :
magnetic
E
=
F q( =xi)
= +
E field CNIC VIm)
strength
=
or
F force (N)
charge
on
=
q
=
charge (C) Electromagnetic Induction
Field due to a point charge A
changing magnetic field induces an EMF
(voltage) :
lications: -
=
↳
E
E
=
-
Generators : mech- > electric
So is the vacum
permittivity ↳
Motors : electric >
-
mech.
I = BA
(magnetic flux)
↳ Transformers change voltage
:
↳
Faraday's Law of Induction
Work done
by an electric field ↳ Lenz'sLaw induced opposes the
current
change
:
levels in AC circuits
in flux
w= g E S
. .
--
Talways
!
perpendicular to both Magnetic Field of a current
Fields
Magnetic velocity and field -
> causes
⑨ circular or helical motion Long straight wire B
=
magnetic force
charge= Loop
on
moving
a
B =I
F =
quB sin O Solenoid
2R
B :
magnetic field strength
B =
MonI
O B
angle between and
:
v
,Ch 18 Fields
.
magnetic page 256
lines of
·2
>
-
UX field. field attraction/repulsion
magnetic in which the
.
between
be felt.
magnets can
= -
ji -
-
-
-
show -direction and seength of
↳ arrows ↳
how close
the
they are
magnetic field
2
Magnetic Flux Density (B) is a vector quantity
and is measured in tesla (T)
magnetic fields and Current
Right-hand grip rule . Direction of field to find direction of the current.
current
↳ used
↑
vice versa
!⑳ C
=
Solenoids
#
-
↳
lines of #
Gave
=
flux
de
-
solenoid
- Lines of flux
-
, magnetic Frux Density page 260
Fix
Density (teslal a Current Lamea >
- B = k +
Long , straight wire. Solenoid
B = B =
Hon I
n = turns per metre
M
=
permeability of free space
C4MX10-7TMA" for vacuum
Lorentz Force page 262
Fleming's left-hand rule
Predicts the direction of the force acting on a wire
↳
Force a conductor in a
magnetic field
metal
on
G Directly proportional to the
magnetic flux ,
Current ,
and the
length of
the conductor .
Force (N) = flux density (T) + Current (A) +
Length of wire (m)
F
BIL
=
F BIL sin G
=
↳
between current and field
Domain 5: Electric Fields
and
Magnetic
Electric Fields -
charge creats a force Lorentz Force
around it ↳ If both
electrical and fields act :
magnetic
E
=
F q( =xi)
= +
E field CNIC VIm)
strength
=
or
F force (N)
charge
on
=
q
=
charge (C) Electromagnetic Induction
Field due to a point charge A
changing magnetic field induces an EMF
(voltage) :
lications: -
=
↳
E
E
=
-
Generators : mech- > electric
So is the vacum
permittivity ↳
Motors : electric >
-
mech.
I = BA
(magnetic flux)
↳ Transformers change voltage
:
↳
Faraday's Law of Induction
Work done
by an electric field ↳ Lenz'sLaw induced opposes the
current
change
:
levels in AC circuits
in flux
w= g E S
. .
--
Talways
!
perpendicular to both Magnetic Field of a current
Fields
Magnetic velocity and field -
> causes
⑨ circular or helical motion Long straight wire B
=
magnetic force
charge= Loop
on
moving
a
B =I
F =
quB sin O Solenoid
2R
B :
magnetic field strength
B =
MonI
O B
angle between and
:
v
,Ch 18 Fields
.
magnetic page 256
lines of
·2
>
-
UX field. field attraction/repulsion
magnetic in which the
.
between
be felt.
magnets can
= -
ji -
-
-
-
show -direction and seength of
↳ arrows ↳
how close
the
they are
magnetic field
2
Magnetic Flux Density (B) is a vector quantity
and is measured in tesla (T)
magnetic fields and Current
Right-hand grip rule . Direction of field to find direction of the current.
current
↳ used
↑
vice versa
!⑳ C
=
Solenoids
#
-
↳
lines of #
Gave
=
flux
de
-
solenoid
- Lines of flux
-
, magnetic Frux Density page 260
Fix
Density (teslal a Current Lamea >
- B = k +
Long , straight wire. Solenoid
B = B =
Hon I
n = turns per metre
M
=
permeability of free space
C4MX10-7TMA" for vacuum
Lorentz Force page 262
Fleming's left-hand rule
Predicts the direction of the force acting on a wire
↳
Force a conductor in a
magnetic field
metal
on
G Directly proportional to the
magnetic flux ,
Current ,
and the
length of
the conductor .
Force (N) = flux density (T) + Current (A) +
Length of wire (m)
F
BIL
=
F BIL sin G
=
↳
between current and field
