Electric Power

1
Physics 12
Electric Power
Concept Map
S. Coghlan
2
This concept map is designed to help you
Understand how the various different parts of
electric power link together.
Study the whole section of work.
Main Concepts
Printer friendly version available from my web
site
Linking words
S. Coghlan
3
Magnetic Fields Force on a conductor in a
field Force on a moving charge in a
field Generation Motors
involves drives causes causes requires
Electric Power
4
Magnetic Fields
Generation
involves
requires
Electric Power
drives
causes
Motors
causes
Force on a conductor in a field
Force on a moving charge in a field
5
Earth Inclination or dip Moving charges in outer
core GNP MNP Variation Field shape
- magnetic flux Bar or horseshoe RH screwdriver
RH grasp Field strength B, tesla
Magnetic Fields
Generation
involves
shows shows has has caused by wire solenoid
units permanent show
requires
Electric Power
drives
causes
Motors
causes
Force on a conductor in a field
Force on a moving charge in a field
6
GNP
RH screwdriver
Moving charges in outer core
MNP
Bar or horseshoe
RH grasp
Inclination or dip
has
has
wire
caused by
solenoid
shows
permanent
Earth
shows
Variation
Field shape magnetic flux
in
show
Magnetic Fields
units
Generation
involves
Field strength B, tesla
requires
Electric Power
drives
causes
Motors
causes
Force on a conductor in a field
Force on a moving charge in a field
7
Moving charges in outer core
GNP
RH screwdriver
require produce applications LH
rule commercial involves low V, low I
can be depends on types high V, low I
MNP
Torque, Fxd Split ring commutator CRO TV Mass
spectrometer AC power supply Home 50
Hz Transmission lines, High V, Low
I Induction Lenzs Law Calcs AC/DC
generator Transformers
has
Bar or horseshoe
RH grasp
caused by
has
Inclination or dip
wire
solenoid
shows
permanent
Earth
shows
Variation
Field shape magnetic flux
in
show
Magnetic Fields
units
Generation
involves
Field strength B, tesla
requires
Electric Power
drives
causes
Motors
causes
Force on a conductor in a field F IlB
Force on a Moving charge in a field F qvB
8
Moving charges in outer core
Step down
RH screwdriver
GNP
MNP
Bar or horseshoe
RH grasp
has
caused by
Step up
wire
has
Inclination or dip
types
solenoid
shows
Transformers
permanent
Earth
shows
Variation
involves
AC/DC generator
Field shape magnetic flux
in
Calcs
show
can be
Magnetic Fields
units
depends on
Generation
Induction
Lenzs Law
involves
Field strength B, tesla
requires
commercial
Electric Power
Transmission lines
high V, low I
drives
AC power supply
causes
Motors
causes
Force on a conductor in a field F IlB
require
low V, low I
Force on a Moving charge in a field F qvB
Split ring commutator
produce
Home 50 Hz
LH rule
Torque, Fxd
applications
TV
CRO
Mass spectrometer
9
Your own concept map
Single page concept map
Electric Power
The End
S. Coghlan
10
You can use these Main Concepts and Linking Words
to complete your own concept map. You can print
out the next page and use it as a framework.
Main Concepts
Magnetic Fields
Force on a conductor in a field Force on
a moving charge in a field Generation Motors
Earth Inclination or dip Moving
charges in outer core GNP
MNP Variation Field shape -
magnetic flux Bar or horseshoe RH screwdriver
RH grasp Field strength B, tesla
Torque, Fxd
Split ring commutator CRO
TV Mass spectrometer AC power supply
Home 50 Hz Transmission lines, High V,
Low I Induction Lenzs Law Calcs
AC/DC generator Transformers
Linking Words
Involves drives causes causes requires shows
shows has has caused by wire solenoid units
permanent show require produce applications
LH rule commercial involves low V, low I
can be depends on types high V, low I
Printer friendly version available from my web
site
11
Electric Power
12
Moving charges in outer core
Step down
RH screwdriver
GNP
MNP
Bar or horseshoe
RH grasp
has
caused by
Step up
wire
has
Inclination or dip
types
solenoid
shows
Transformers
permanent
Earth
shows
Variation
involves
AC/DC generator
Field shape magnetic flux
in
Calcs
show
can be
Magnetic Fields
units
depends on
Generation
Induction
Lenzs Law
involves
Field strength B, tesla
requires
commercial
Electric Power
Transmission lines
high V, low I
drives
AC power supply
causes
Motors
causes
Force on a conductor in a field F IlB
require
low V, low I
Force on a Moving charge in a field F qvB
Split ring commutator
produce
Home 50 Hz
LH rule
Torque, Fxd
applications
TV
CRO
Mass spectrometer
13
Conventional current

-
Electric Field
Electron current

-
Electric Field
14
Alternating current
V
t
Direct current
V
t