Download Electrical Engineering

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Thermophotovoltaic wikipedia, lookup

Photoelectric effect wikipedia, lookup

Nanofluidic circuitry wikipedia, lookup

Electrochemistry wikipedia, lookup

Solid wikipedia, lookup

History of electrochemistry wikipedia, lookup

 Covers
two main areas:
 - Electricity
 - Electronics
 All
appliances and electrical devices
depend on electrical circuits
Electrical component are made with a
type of material:
- Semiconductor (silicon)
- Conductors (metals & alloys)
Direct current (DC): is an electric
current in which the electrons
are continuously moving in the
same direction.
Alternating current (AC): is an
electrical current in which the
electrons move back and forth in
a regular pattern
 Is
the role that a component plays in the
control or transformation of electric
 Power
supply: is the electrical function
preformed by any component that can
generate or provide an electric current in
a circuit
Battery: Transforms
chemical energy into
electrical energy
Advantages: portable,
many appliances run on
batteries must be
replaced, contaminate
the environment around
the landfill by leaking
heavy metals
Electrical outlet:
contains contacts and is
permanently connected
to an electrical network
Advantages: stable and
long lasting power
hydroelectric dams
cause flooding of vast
areas of land. Appliances
cannot be moved far
from the wall outlet
Photovoltaic cell: (solar
cell) electronic device that
generates an electrical
current when exposed to
Advantages: portable, do
not produce green house
gases, have a lifespan of 20
to 30 years.
Disadvantages: Depends
on sunny conditions. Much
more expensive to install
than other sources of
 Conduction:
 When
a component
can transmit electric
current from one part
of a circuit to another
 Examples
conductors: copper,
gold, etc...
 Insulation
 When
a component
prevents an electric
current from flowing.
 Examples
insulators: ceramic,
rubber, plastic
A filament
melts/breaks if
current exceeds a
certain level
A strip becomes hot
and bends if current
exceeds a certain level.
A switch is thrown to
restore circuit
Closed circuit: electric
current flows in a loop
Open circuit: electric
current cannot flow in a
 P. 479
 #1
to 8, 10, 11, 13, 15
 The
transformation of energy is the
electrical function performed by any
component that can convert electrical
energy into another form of energy
 Chemical
 Thermal
 Mechanical
 Radiation
Incandescent light bulbs
(luminous energy)
Heating elements
(thermal energy)
Piezoelectric crystals
(mechanical energy)
(magnetic energy)