Vocab Flashcards
Work
The application of a force (energy) at a distance to accomplish a task
Power
The rate at which work is performed
Electricity
The presence of charged particles such as electricity and protons
Valence she’ll
Determines conductivity
6-8 electrons : insulators
4-7 electrons : semi - conductors
1-3 electrons : conductors
The Law of Charge
Like charges repel each other and opposite charges attract each other
Electric fields
Surround anything with an electric charge
Electromagnetic Fields
Radiating waves of magnetic energy in all directions
Current
DC / AC
The flow of electrons through a conductor
Conventional Flow
Charge moves from positive side to negative side
Actual flow
Charge moves from negative surplus side to positive deficiency side ( we use this )
Resistance
The opposition to the flow of electricity
Measured in Ohms
Wattage (power)
The work performed by electrical power
Making a lightbulb glow
Ohm’s Law
There is a mathematical relationship between the 3 elements of electricity
E= Volts
I= Current in Amps
R=resistance in Ohms
Joule’s Law
PIE
Coulomb
1 Coulomb = 1 x 10^18 electrons
Circuit
Closed path that allows electrons to flow.
Source
Path
Load
Source
Provides power (voltage and current) Must have 2 terminals (pos and neg)
Path
Conductor by which current flows
Load
Where the work is being done
Resistors
Resist flow of electricity
Fixed
Variable; volume control/light dimmer
Energy
The ability to do mechanical work
