Electrical Theory Flashcards
Define a semi conductor
A semi conductor contains 4 electrons in the outer ring
How many electrons are in the outer ring of a conductor
1-3 electrons quantify a conductor
Define a insulator and explain why it is difficult for it to conduct
A insulator contains 5-8+ electrons in the outer ring, it is difficult because of the bond between the electrons and nucleus
How many atoms approximately would it take to fill one cubic centimetre ?
Approximately. 110000000000000000000000
However the fuck much that is
What is an electron?
A negatively charged particle
What defines a proton
A positively charged particle
What would cause an atom to gain or lose electrons (3 things)
Electrical mechanical and chemical activity
The electrons within the outside ring of a atom are called _______ electrons .
What is valence electrons
Define Coulomb’s law ,
Opposite charged particles attract ,like charges repel
Electrons have a what kind of charge?
Negative
An element consists of
Only one kind of atom
What is inside the Necleus of an atom?
Protons and Neutrons
a conductor of electricity is a material that?
Allows the Electrons to move through it
Atoms consist of what 3 smaller particles?
Electrons, Protons, Neutrons
Define Voltage in one word. Electrical what?
Force or Pressure
Most insulators are compounds of?
Two or more elements
Resistance of a conductor is determend by what 4 things?
Length, Cross - sectional area, temperature and type of material.
The opposition of electron flow is?
Resistance
Define Resistance
Opposition to the flow of electrons
What does MALT stand for
Material
Area
Length
Temperature
What is a resistor
A device device that offers resistance to the electron flow
The cross-sectional area of a conductor is
A factor in determining the amount of resistance in a conductor.
What is a positive temperature coefficient of resistance
The resistance of a material goes up as the temperature goes up.
How does length affect the resistance in a conductor
The longer the conductor the more resistance is in the conductor
What is a negative temperature coefficient of resistance
The resistance of a material decreases as the temperature rises.
Voltage and resistance determine the amount of _________ in a circuit
current flow
What does D/C stand for
Direct Current
If there is more voltage in a circuit what would also increase
Current flow
What does A/C stand for
Alternating current
Current is electrical what?
Flow
What source of voltage requires polarity markings?
Direct Voltage
Why should we as heavy duty techs wear static wrist straps when working on electrical components?
To prevent a static discharge created from friction
What is ESD?
Electrostatic Discharge
A properly attached ground strap will ____ __ any electrostatic discharges before they can build up.
bleed off
All materials are composed of
Atoms
When an atom gains and electron, its _______charged
negativly
Charged atoms( + or -) are called
ions
when an atom loses one or more electrons is called
a positivly charged ion
