Electric Current

1
Electric Current Current a measure of the rate
of electron flow past a given point in a
circuit -measured in amperes (A) LG
to understand electric current at a basic level
2
Electric Current Current a measure of the rate
of electron flow past a given point in a
circuit -measured in amperes (A) Simplest
Definition of electrons LG to
understand electric current at a basic level
3
Electric Current Ammeter device used to measure
electric current -has to be connected in series
to count all electrons LG to
understand electric current at a basic level
4
Electric Current Reading Meters the scale used
depends on the connection you attach the wire
to. -determine the value of each mark between
numbers -estimate the last digit between
marks LG to understand electric current
at a basic level
5
Electric Current LG to understand
electric current at a basic level
6
Electric Current Amperage
? LG to understand electric current at a basic
level
7
Electric Current Amperage
12.38 A LG to understand electric current at a
basic level
8
Electric Current Amperage
? LG to understand electric current at a basic
level
9
Electric Current Amperage 21.7
A LG to understand electric current at a basic
level
10
Electric Current Safety with Electric Currents
large currents can damage electrical devices
cause fires Fuses Circuit Breakers open the
circuit if current flow is too high -placed in
series with everything else on the
circuit LG to understand electric
current at a basic level
11
Electric Current Fuse LG to
understand electric current at a basic level
12
Electric Current Circuit Breaker
LG to understand electric current at a basic
level
13
Electric Current Electrical Shock the brain and
nervous system send messages using electrical
signals -even small amounts of current are
dangerous LG to understand
electric current at a basic level
14
Electric Current Electrical Shock the brain and
nervous system send messages using electrical
signals -even small amounts of current are
dangerous 0.050 0.150 A muscles contract or
convulse out of control -called "let go"
threshold because beyond that current a person
can no longer let go of the object shocking
them LG to understand electric current
at a basic level
15
Electric Current Electrical Shock the brain and
nervous system send messages using electrical
signals -even small amounts of current are
dangerous 0.050 0.150 A muscles contract or
convulse out of control -called "let go"
threshold because beyond that current a person
can no longer let go of the object shocking
them 1.0 4.3 A will stop the heart 15 A
the amount of current from a wall outlet LG to
understand electric current at a basic level