NCATT AET EXAM PREP
Atoms represent the smallest elements that exist in nature
Atoms are made up of protons, neutrons and electrons
Nucleaus center of the atom
Electrons travel at the speed of light
Protons positively charged subatomic particles
Protons contain a positive electrical potential
Protons positive charge affect the orbits of the electrons
Neutrons are neutral subatomic particles
Neutrons are not involved in the conduction of electricity
Electron's charge is negative
The speed of rotation combined with electrical keeps the electrons in their orbits
potential
The attraction of opposite charges holds the electron in its orbit
Conductors easily permit the movement of electrons from an electrical source to a load
and back to the electrical source with a minimum of resistance
First two inner orbits make up the atomic number for the element
During conductance an extra valence electron flows into the next atoms valance orbit
Good conductors Only those elements that dont hang on to their valence electrons
Good Insulators Elements that don't give up valance electrons no matter what force is applied
, NCATT AET EXAM PREP
lators a material or device used to prevent the passage of heat, electricity or sound
from one medium to another
Examples of insulators Glass, Mica, Silica
Air can be a good insulator but will spark when enough electrical force is applied
Static Electricity an electrical charge that may be built up on a non-conductive surface by
friction
Static electricity serves no useful purpose in aviation and cost millions of dollars in damage every year
Voltage electric potential energy per unit charge measured in joules per coulomb
Coulomb basic unit of electrical quantiy
Coluomb is equal to 6.28 billion-billion electrons
Coluomb is the actual count of electrons in a unit of measure
Joule amount of electrons in a suspended state as compared to some electrons in an
adjacent part of the circuit
Electromotive Force is the force required to move an electron measured in volts
EMF is the force required to cause one amp of the current of flow through one ohm
of reistance
Mechanical, Chemical, Friction three methods used to generate EMF
Volt basic unit of measure of electrical pressure
A Volt is that amount of force required to cause on amp of current to flow through one ohm of resistance
E is the symbol for volts
Current is the flow of electricity that pass a given point in a specific amount of time
I is the symbol for amps
, NCATT AET EXAM PREP
Amps unit of measure used to express the flow of electrons
Current flows from a negative electrical potential to a positive one
Resistance is electrical opposition to the current flow in a conductor
Resistance does what opposed or slows down another force, drops, voltage and consumes power
First rule of resistance current will take the path of less resistance
Zig zag line symbol of a resistor in an electrical schematic
Resistance is measured in Ohms and uses the omega symbol
One ohm limits the flow of current to one amp under a voltage pressure of one volt
Ohms law states the amount of current flowing in a circuit is directly proportional to the circuit
voltage and inversely proportional to the circuit resistance
Ohm's Law I= V/R, Current is equal to Voltage divided by resistance
Watt a basic unit of electrical power that is the product of voltage multiplied by
current
One Watt equals 1/746 horsepower
One watt is produced when a circut that has one amp of current flowing under a pressure of one volt
First rule of series circuits there is only one path for current to flow therefore current equal throughout
the circuit
Second rule of series circuits the voltage drop at each resistor will be the sum of total applied voltage
Parallel circuits are those that offer several paths for current flow
Current is divided in a parallel circuit evenly between the branches
In a parallel circuit the total current load is the sum of the currents in the banches
In a parallel circuit, voltage is common through each of the branches
In series parallel cicuits, each section needs to be worked to its simplest elements then reworked to fill
in the unknowns
A capacitor an electrical component used to store electrical energy in the form of an
electrostatic field
A capacitor is made of two parallel conductors seperated by an insulator called the diaelectric
Atoms represent the smallest elements that exist in nature
Atoms are made up of protons, neutrons and electrons
Nucleaus center of the atom
Electrons travel at the speed of light
Protons positively charged subatomic particles
Protons contain a positive electrical potential
Protons positive charge affect the orbits of the electrons
Neutrons are neutral subatomic particles
Neutrons are not involved in the conduction of electricity
Electron's charge is negative
The speed of rotation combined with electrical keeps the electrons in their orbits
potential
The attraction of opposite charges holds the electron in its orbit
Conductors easily permit the movement of electrons from an electrical source to a load
and back to the electrical source with a minimum of resistance
First two inner orbits make up the atomic number for the element
During conductance an extra valence electron flows into the next atoms valance orbit
Good conductors Only those elements that dont hang on to their valence electrons
Good Insulators Elements that don't give up valance electrons no matter what force is applied
, NCATT AET EXAM PREP
lators a material or device used to prevent the passage of heat, electricity or sound
from one medium to another
Examples of insulators Glass, Mica, Silica
Air can be a good insulator but will spark when enough electrical force is applied
Static Electricity an electrical charge that may be built up on a non-conductive surface by
friction
Static electricity serves no useful purpose in aviation and cost millions of dollars in damage every year
Voltage electric potential energy per unit charge measured in joules per coulomb
Coulomb basic unit of electrical quantiy
Coluomb is equal to 6.28 billion-billion electrons
Coluomb is the actual count of electrons in a unit of measure
Joule amount of electrons in a suspended state as compared to some electrons in an
adjacent part of the circuit
Electromotive Force is the force required to move an electron measured in volts
EMF is the force required to cause one amp of the current of flow through one ohm
of reistance
Mechanical, Chemical, Friction three methods used to generate EMF
Volt basic unit of measure of electrical pressure
A Volt is that amount of force required to cause on amp of current to flow through one ohm of resistance
E is the symbol for volts
Current is the flow of electricity that pass a given point in a specific amount of time
I is the symbol for amps
, NCATT AET EXAM PREP
Amps unit of measure used to express the flow of electrons
Current flows from a negative electrical potential to a positive one
Resistance is electrical opposition to the current flow in a conductor
Resistance does what opposed or slows down another force, drops, voltage and consumes power
First rule of resistance current will take the path of less resistance
Zig zag line symbol of a resistor in an electrical schematic
Resistance is measured in Ohms and uses the omega symbol
One ohm limits the flow of current to one amp under a voltage pressure of one volt
Ohms law states the amount of current flowing in a circuit is directly proportional to the circuit
voltage and inversely proportional to the circuit resistance
Ohm's Law I= V/R, Current is equal to Voltage divided by resistance
Watt a basic unit of electrical power that is the product of voltage multiplied by
current
One Watt equals 1/746 horsepower
One watt is produced when a circut that has one amp of current flowing under a pressure of one volt
First rule of series circuits there is only one path for current to flow therefore current equal throughout
the circuit
Second rule of series circuits the voltage drop at each resistor will be the sum of total applied voltage
Parallel circuits are those that offer several paths for current flow
Current is divided in a parallel circuit evenly between the branches
In a parallel circuit the total current load is the sum of the currents in the banches
In a parallel circuit, voltage is common through each of the branches
In series parallel cicuits, each section needs to be worked to its simplest elements then reworked to fill
in the unknowns
A capacitor an electrical component used to store electrical energy in the form of an
electrostatic field
A capacitor is made of two parallel conductors seperated by an insulator called the diaelectric
