SLTC - Final Exam
What do all atoms contain? - answer protons, neutrons, electrons
Protons are ______ charged - answer positively
Electrons are _____ charged - answer negatively
There are two important factors to understanding atoms: - answer1. the law of charges
states that opposites attract an likes repel.
2. the law of centrifugal force states that a spinning object will pull away from its center
point and that the faster it spins the greater the force becomes.
What is the outermost shell of an atom? - answer valence shell
What are the three categories of an atom? - answer1. Conductors
2. Insulators
3. Semiconductors
How many valence electrons so conductors have? - answer3 or less
How many valence electrons do insulators have? - answer5 or more
How many valence electrons do semi-conductors have? - answer4
True or False: One fundamental law of physics states that energy can be converted
from one form to another but can not be created nor destroyed. - answerTrue
What are the 6 basic sources of energy that can be used to detach electrons from their
orbits and sustain current? - answer1. Friction
2. Heat
3. Pressure
4. Chemical Reaction
5. Light
6. Magnetism
Which 4 sources of energy are used primarily in special applications? - answer1.
Friction
2. Heat.
3. Pressure
4. Light
,Which 2 sources of energy are more commonly used to produce large amounts of
energy? - answer1. Chemical Reaction
2. Magnetism
True or False: Static electricity mean moving (lighting is static electricity) - answerFalse:
Static electricity does not move (lighting still is static)
True or False: DC current does not change unless it is turned on or off. - answerTrue
True or False: AC currents never change direction in the electromagnetic field. -
answerFalse: AC current changes direction many times per second in the
electromagnetic field.
Electrical current is the movement, or flow, of electrons. Current is measured in
_______. - answerAmperes
True or False: One amp of current flows through a conductor when one coulomb flows
past a given point in one second. - answerTrue
Voltage affects many things including: - answer1. The amount of insulation needed for a
given power
2. The separation required between line conductors
3. Safe working practices
4. The types of tools needed
The rate of 1 joule of work in 1 second is the basic unit of power, and is called a
______. - answerWatt
A power level of 1 horse power is approximately equivalent to ______ watts. -
answer746
The relationship between current, voltage, and resistance was described by Georg
Simon Ohm in a form that is commonly referred to as ______ ___. - answerOhm's Law
Power (watts) is calculated by multiplying _______ times _______. - answerVoltage and
Amps
When talking about AC voltage, positive and negative refer to the direction or current
flow. Positive voltage causes electrons to flow away from the stations and negative
voltage causes electrons to flow _____ towards the generating station. -
answerTowards
The direction of current flow is also known as: - answerPolarity
Three things needed to produce alternating current are: - answer1. A conductor
2. A magnetic field
, 3. Relative motion between the two
The strength of the voltage being produced depends on 3 primary factors: - answer1.
The number of turns in the coil or wire
2. The strength of the magnetic field
3. The speed at which the magnetic lines of flux pass through the coil (induction)
True of False: A forcer applied to the free electrons in the conductor causes them to
move. Since the force causes current flow, it can be considered an electromagnetic
force (EMF) or voltage. - answerTrue
True of False: An AC generator consists of a single loop of wire, which is placed
between the poles of permanent magnets and made to rotate. - answerTrue
A sine wave is a: - answerGraphical representation of what is happening to the voltage
in an AC current over a period of time.
A sine wave passes "0" how many times per full rotation? - answer3
Frequency is measured in: - answerHertz
Root means square (RMS) is the actual amount of useful ______. - answerVoltage
RMS = ______ x Peak Voltage - answer0.707
True of False: A phase meter, also known as a phase tester, is used to check the
primary (low voltage) phase rotation. A phase meter is essentially a voltmeter for low
voltage. - answerFalse: A phase meter is used to check "HIGH VOLTAGE" of each
phase.
How many paths of current flow does a series circuit have? - answerOnly 1
What is constant in a series circuit? - answer"I" (intensity) or Amperes
A parallel circuit always contains __ or more paths in which current can flow. - answer2
True of False: An increase in the number of branches in a parallel circuit will cause an
increase in total current flow and decrease in total resistance in that circuit. -
answerTrue
Combination circuits are also known as series-parallel because they are exactly that, a
combination of both ______ _______ and ______ _______ - answerSeries circuits and
Parallel circuits
What is the most common type of circuit for interior wiring? - answerSeries-parallel
What do all atoms contain? - answer protons, neutrons, electrons
Protons are ______ charged - answer positively
Electrons are _____ charged - answer negatively
There are two important factors to understanding atoms: - answer1. the law of charges
states that opposites attract an likes repel.
2. the law of centrifugal force states that a spinning object will pull away from its center
point and that the faster it spins the greater the force becomes.
What is the outermost shell of an atom? - answer valence shell
What are the three categories of an atom? - answer1. Conductors
2. Insulators
3. Semiconductors
How many valence electrons so conductors have? - answer3 or less
How many valence electrons do insulators have? - answer5 or more
How many valence electrons do semi-conductors have? - answer4
True or False: One fundamental law of physics states that energy can be converted
from one form to another but can not be created nor destroyed. - answerTrue
What are the 6 basic sources of energy that can be used to detach electrons from their
orbits and sustain current? - answer1. Friction
2. Heat
3. Pressure
4. Chemical Reaction
5. Light
6. Magnetism
Which 4 sources of energy are used primarily in special applications? - answer1.
Friction
2. Heat.
3. Pressure
4. Light
,Which 2 sources of energy are more commonly used to produce large amounts of
energy? - answer1. Chemical Reaction
2. Magnetism
True or False: Static electricity mean moving (lighting is static electricity) - answerFalse:
Static electricity does not move (lighting still is static)
True or False: DC current does not change unless it is turned on or off. - answerTrue
True or False: AC currents never change direction in the electromagnetic field. -
answerFalse: AC current changes direction many times per second in the
electromagnetic field.
Electrical current is the movement, or flow, of electrons. Current is measured in
_______. - answerAmperes
True or False: One amp of current flows through a conductor when one coulomb flows
past a given point in one second. - answerTrue
Voltage affects many things including: - answer1. The amount of insulation needed for a
given power
2. The separation required between line conductors
3. Safe working practices
4. The types of tools needed
The rate of 1 joule of work in 1 second is the basic unit of power, and is called a
______. - answerWatt
A power level of 1 horse power is approximately equivalent to ______ watts. -
answer746
The relationship between current, voltage, and resistance was described by Georg
Simon Ohm in a form that is commonly referred to as ______ ___. - answerOhm's Law
Power (watts) is calculated by multiplying _______ times _______. - answerVoltage and
Amps
When talking about AC voltage, positive and negative refer to the direction or current
flow. Positive voltage causes electrons to flow away from the stations and negative
voltage causes electrons to flow _____ towards the generating station. -
answerTowards
The direction of current flow is also known as: - answerPolarity
Three things needed to produce alternating current are: - answer1. A conductor
2. A magnetic field
, 3. Relative motion between the two
The strength of the voltage being produced depends on 3 primary factors: - answer1.
The number of turns in the coil or wire
2. The strength of the magnetic field
3. The speed at which the magnetic lines of flux pass through the coil (induction)
True of False: A forcer applied to the free electrons in the conductor causes them to
move. Since the force causes current flow, it can be considered an electromagnetic
force (EMF) or voltage. - answerTrue
True of False: An AC generator consists of a single loop of wire, which is placed
between the poles of permanent magnets and made to rotate. - answerTrue
A sine wave is a: - answerGraphical representation of what is happening to the voltage
in an AC current over a period of time.
A sine wave passes "0" how many times per full rotation? - answer3
Frequency is measured in: - answerHertz
Root means square (RMS) is the actual amount of useful ______. - answerVoltage
RMS = ______ x Peak Voltage - answer0.707
True of False: A phase meter, also known as a phase tester, is used to check the
primary (low voltage) phase rotation. A phase meter is essentially a voltmeter for low
voltage. - answerFalse: A phase meter is used to check "HIGH VOLTAGE" of each
phase.
How many paths of current flow does a series circuit have? - answerOnly 1
What is constant in a series circuit? - answer"I" (intensity) or Amperes
A parallel circuit always contains __ or more paths in which current can flow. - answer2
True of False: An increase in the number of branches in a parallel circuit will cause an
increase in total current flow and decrease in total resistance in that circuit. -
answerTrue
Combination circuits are also known as series-parallel because they are exactly that, a
combination of both ______ _______ and ______ _______ - answerSeries circuits and
Parallel circuits
What is the most common type of circuit for interior wiring? - answerSeries-parallel
