INSTALLER TECHNICIAN CONVENTIONAL
QUESTIONS
Why do only the outer electrons leave their orbit shells? - Answer -Only outer electrons
leave their orbit shells, because electrons furthest from the nuclear us are more easily
freed from their orbits due to a weaker electrostatic force
What is required to have a balanced atom? - Answer -The number of electrons must
equal the number of protons to have a balanced atom
List the capacity for each of the first for orbital shells of an atom - Answer -Shell 1=2
electrons, shell 2= 8 electrons, shell 3= 18 electrons, and shell 4 is 32 electrons
What is the maximum electron capacity of a valance shell? - Answer -The valence shell
can hold a maximum of eight electrons
Electrons in orbit nearest the nuclear us contain———-energy than those in more
distant orbits. - Answer -Electrons in orbit nearest the Nicolas contain less energy than
those in more distant orbits
What happens to a valance electron that has enough energy added to it? - Answer -A
valence electron that has enough energy added to it, moves away from its Atom
What is the major factor that determines the category of a particular element? - Answer
-The number of electrons in the valance shell of determines the element category
How many valence electrons are there in a good conductor? - Answer -Good conductor
has only one or two valence electrons
List, gold, silver, and copper in the order of the best connectivity - Answer -Silver,
copper, gold
Why do metals that each have only one valence electron differ in their conductivity -
Answer -Metals that each have one valance electron differ in their conductivity, because
of the way their atoms pack together into a solid structure
Describe the two characteristics of an insulator - Answer -The two characteristics of an
insulator are its valence Shell is almost filled and tends to be fairly stable and two it,
tries to finish, filling its valance shell by capturing additional free electrons.
How many valence electrons are in a semiconductor - Answer -A semiconductor has
four valence electrons.
,Name of the two types of electron current flow - Answer -Random drift and directed.
Flow are the two types of electron current flow.
What causes electrons to be knocked loose and travel randomly from one atom to
another - Answer -The movement of atoms in materials that are conductors and the
agitation as they collide cause electrons to be knocked loose and travel randomly from
one atom to another
What can force electrons to all move in the same direction? - Answer -Applying a
negative charge to one end of the wire in a positive charge to the other can force
electrons to all move in the same direction
What actually produces electric current? - Answer -The transfer of energy from valence
electron to valance electron as a result of applied charges is what actually produces
electric current
How does the speed of electric current compared to that of electron travel? - Answer -
The affective speed of electric current is 186, 00 0 mi./s is much faster than the actual
speed of electron travel
What is the basic measurement unit of electron current? - Answer -The ampere is the
basic measurement unit for electron current
Define electromotive force (EMF) - Answer -EMF is the electrical force that motivates
electrons to move in a wire
What does the term potential difference mean? - Answer -Potential difference is the
algebraic difference between the electrical individual potential's of two points
What is the potential difference between two negative charges of equal value - Answer
-The potential difference between two negative charges of equal value of zero. There is
no potential difference.
What is the unit used to indicate the strength or size of the potential difference? -
Answer -The vault is the unit used to indicate the strength or size of the potential
difference
Define a volt in terms of current and resistance. - Answer -1 V is the amount of force
required to produce a current of one amp through a resistance of one ohm
What are three alternate ways to Express five and 3MA - Answer -5 microvolts,
5/1000000 volts or 0.00005 V, and three Milla amps. 3/1000 amps or 0.003 A
What are two alternate ways to express 2 megavolt? - Answer -2MV or 2 million volts
What are two alternate ways to express for kilovolts? - Answer -4kv or 4000 volts
,Which orbital shell has a maximum electron capacity of 18 electrons - Answer -The
third shell
Why are semiconductor material is not good conductors nor good insulators - Answer -
The valance shells are only half filled
Which of the following best describes a conductor - Answer -Elements that have a
small number of electrons in the Valence shell
Which of the following best describes the relationship between an amp and a coulomb -
Answer -The number of amps is equivalent to the number of coulombs passing a given
point during one second
How is electric current produced? - Answer -From the transfer of energy from valance
electron to valance electron because of applied charges
What prevents the electrons that orbit an atoms nucleus at high speeds from breaking
away from the nucleolus do to centrifugal force - Answer -The attraction between the
positive nucleus in the negative electron
What is 5kV equivalent to - Answer -5000 v
Elements without the production or movement of free electrons are considered? -
Answer -Insulators
What best describes the type of electron flow called random drift - Answer -Free
electrons traveling randomly from one atom to another in an insulator
What is the effective speed of electric current? - Answer -186, 00 0 mi./s
What do scientists believe causes magnetism? - Answer -Scientists believe that
magnetism results from the spinning action of each electron on its own axis and orbiting
around its own nucleus.
Describe the pattern arrangement of the magnetic domains in non-magnetized in
magnetized materials - Answer -The magnetic domains in a non-magnetized material,
arrange in a random pattern which causes the effects to cancel, resulting in no magnetic
field those in a magnetized material a line in the same direction which causes their
magnetic fields to add making the material magnetized
Describe the two methods for creating a magnet - Answer -Two methods for creating a
magnet include: (1) stroking a magnetic metal with a magnet; and (2) wrapping wire
around a magnetic metal and passing electric current through the wire.
, Explain the law of attraction and repulsion between two magnets - Answer -The law of
attraction and repulsion between two magnets states that like magnet poles, repel each
other well, unlike magnetic poles attract each other
Describe two methods for demagnetizing a magnet - Answer -Two methods for
demagnetizing a magnet are vibration and heat.
List the five basic rules that magnetic flux lines follow - Answer -Do you have direction
or polarity, they always form complete loops, they cannot cross one another, they tend
to form the smallest possible loops, they can pass through magnetic and non-magnetic
materials
What is an electromagnet? - Answer -An electromagnet is a temporary magnet that is
made by applying a potential difference to a wire that is wrapped around a core of
magnetic material
Does the magnetic field around the wire that is conducting current become stronger or
weaker as the distance from the wire increases? why? - Answer -The magnetic field
around a current, carrying conductor, becomes weaker as the distance from the
conductor increases because the flux lines become further apart
How do the magnetic field between two closely spaced parallel wires that are
conducting current interact with each other if the current flow in both wires is in the
same direction? - Answer -The Magnetic Fields of too closely spaced, parallel wires
that are conducting current in the same direction will add together because the flex lines
will go in the same direction forming loops around the wires. The flex lines will attract
one another, causing the wires to draw together.
Why is the overall magnetic field created by forming loops of why are stronger than that
created by a street piece of wire both having the same current flow - Answer -The
overall magnetic field created by forming loops of wire, is stronger than that caused by a
straight piece of wire, because the flex lines in a coil of wire are closer together, and
that's the majority of the flex lines are concentrated in the center or core of the loops
Explain how to determine the direction of the magnetic field in an electromagnet -
Answer -Use the left hand rule for electromagnetism in a coil to determine the location
of an electromagnet North Pole, and as a result, the direction of its magnetic field when
you wrap the fingers of your left hand around the coil of wire in the direction of current
flow, your thumb will point to the electromagnet north pole. The direction of the
magnetic field leaves from the electromagnetic north pole and re-enters at the south
pole.
Name three ways to increase the strength of an electromagnetic field - Answer -
Increasing the current flow , increasing the number of turns in the coil, placing an iron
core inside the coil, increasing the flux line density
QUESTIONS
Why do only the outer electrons leave their orbit shells? - Answer -Only outer electrons
leave their orbit shells, because electrons furthest from the nuclear us are more easily
freed from their orbits due to a weaker electrostatic force
What is required to have a balanced atom? - Answer -The number of electrons must
equal the number of protons to have a balanced atom
List the capacity for each of the first for orbital shells of an atom - Answer -Shell 1=2
electrons, shell 2= 8 electrons, shell 3= 18 electrons, and shell 4 is 32 electrons
What is the maximum electron capacity of a valance shell? - Answer -The valence shell
can hold a maximum of eight electrons
Electrons in orbit nearest the nuclear us contain———-energy than those in more
distant orbits. - Answer -Electrons in orbit nearest the Nicolas contain less energy than
those in more distant orbits
What happens to a valance electron that has enough energy added to it? - Answer -A
valence electron that has enough energy added to it, moves away from its Atom
What is the major factor that determines the category of a particular element? - Answer
-The number of electrons in the valance shell of determines the element category
How many valence electrons are there in a good conductor? - Answer -Good conductor
has only one or two valence electrons
List, gold, silver, and copper in the order of the best connectivity - Answer -Silver,
copper, gold
Why do metals that each have only one valence electron differ in their conductivity -
Answer -Metals that each have one valance electron differ in their conductivity, because
of the way their atoms pack together into a solid structure
Describe the two characteristics of an insulator - Answer -The two characteristics of an
insulator are its valence Shell is almost filled and tends to be fairly stable and two it,
tries to finish, filling its valance shell by capturing additional free electrons.
How many valence electrons are in a semiconductor - Answer -A semiconductor has
four valence electrons.
,Name of the two types of electron current flow - Answer -Random drift and directed.
Flow are the two types of electron current flow.
What causes electrons to be knocked loose and travel randomly from one atom to
another - Answer -The movement of atoms in materials that are conductors and the
agitation as they collide cause electrons to be knocked loose and travel randomly from
one atom to another
What can force electrons to all move in the same direction? - Answer -Applying a
negative charge to one end of the wire in a positive charge to the other can force
electrons to all move in the same direction
What actually produces electric current? - Answer -The transfer of energy from valence
electron to valance electron as a result of applied charges is what actually produces
electric current
How does the speed of electric current compared to that of electron travel? - Answer -
The affective speed of electric current is 186, 00 0 mi./s is much faster than the actual
speed of electron travel
What is the basic measurement unit of electron current? - Answer -The ampere is the
basic measurement unit for electron current
Define electromotive force (EMF) - Answer -EMF is the electrical force that motivates
electrons to move in a wire
What does the term potential difference mean? - Answer -Potential difference is the
algebraic difference between the electrical individual potential's of two points
What is the potential difference between two negative charges of equal value - Answer
-The potential difference between two negative charges of equal value of zero. There is
no potential difference.
What is the unit used to indicate the strength or size of the potential difference? -
Answer -The vault is the unit used to indicate the strength or size of the potential
difference
Define a volt in terms of current and resistance. - Answer -1 V is the amount of force
required to produce a current of one amp through a resistance of one ohm
What are three alternate ways to Express five and 3MA - Answer -5 microvolts,
5/1000000 volts or 0.00005 V, and three Milla amps. 3/1000 amps or 0.003 A
What are two alternate ways to express 2 megavolt? - Answer -2MV or 2 million volts
What are two alternate ways to express for kilovolts? - Answer -4kv or 4000 volts
,Which orbital shell has a maximum electron capacity of 18 electrons - Answer -The
third shell
Why are semiconductor material is not good conductors nor good insulators - Answer -
The valance shells are only half filled
Which of the following best describes a conductor - Answer -Elements that have a
small number of electrons in the Valence shell
Which of the following best describes the relationship between an amp and a coulomb -
Answer -The number of amps is equivalent to the number of coulombs passing a given
point during one second
How is electric current produced? - Answer -From the transfer of energy from valance
electron to valance electron because of applied charges
What prevents the electrons that orbit an atoms nucleus at high speeds from breaking
away from the nucleolus do to centrifugal force - Answer -The attraction between the
positive nucleus in the negative electron
What is 5kV equivalent to - Answer -5000 v
Elements without the production or movement of free electrons are considered? -
Answer -Insulators
What best describes the type of electron flow called random drift - Answer -Free
electrons traveling randomly from one atom to another in an insulator
What is the effective speed of electric current? - Answer -186, 00 0 mi./s
What do scientists believe causes magnetism? - Answer -Scientists believe that
magnetism results from the spinning action of each electron on its own axis and orbiting
around its own nucleus.
Describe the pattern arrangement of the magnetic domains in non-magnetized in
magnetized materials - Answer -The magnetic domains in a non-magnetized material,
arrange in a random pattern which causes the effects to cancel, resulting in no magnetic
field those in a magnetized material a line in the same direction which causes their
magnetic fields to add making the material magnetized
Describe the two methods for creating a magnet - Answer -Two methods for creating a
magnet include: (1) stroking a magnetic metal with a magnet; and (2) wrapping wire
around a magnetic metal and passing electric current through the wire.
, Explain the law of attraction and repulsion between two magnets - Answer -The law of
attraction and repulsion between two magnets states that like magnet poles, repel each
other well, unlike magnetic poles attract each other
Describe two methods for demagnetizing a magnet - Answer -Two methods for
demagnetizing a magnet are vibration and heat.
List the five basic rules that magnetic flux lines follow - Answer -Do you have direction
or polarity, they always form complete loops, they cannot cross one another, they tend
to form the smallest possible loops, they can pass through magnetic and non-magnetic
materials
What is an electromagnet? - Answer -An electromagnet is a temporary magnet that is
made by applying a potential difference to a wire that is wrapped around a core of
magnetic material
Does the magnetic field around the wire that is conducting current become stronger or
weaker as the distance from the wire increases? why? - Answer -The magnetic field
around a current, carrying conductor, becomes weaker as the distance from the
conductor increases because the flux lines become further apart
How do the magnetic field between two closely spaced parallel wires that are
conducting current interact with each other if the current flow in both wires is in the
same direction? - Answer -The Magnetic Fields of too closely spaced, parallel wires
that are conducting current in the same direction will add together because the flex lines
will go in the same direction forming loops around the wires. The flex lines will attract
one another, causing the wires to draw together.
Why is the overall magnetic field created by forming loops of why are stronger than that
created by a street piece of wire both having the same current flow - Answer -The
overall magnetic field created by forming loops of wire, is stronger than that caused by a
straight piece of wire, because the flex lines in a coil of wire are closer together, and
that's the majority of the flex lines are concentrated in the center or core of the loops
Explain how to determine the direction of the magnetic field in an electromagnet -
Answer -Use the left hand rule for electromagnetism in a coil to determine the location
of an electromagnet North Pole, and as a result, the direction of its magnetic field when
you wrap the fingers of your left hand around the coil of wire in the direction of current
flow, your thumb will point to the electromagnet north pole. The direction of the
magnetic field leaves from the electromagnetic north pole and re-enters at the south
pole.
Name three ways to increase the strength of an electromagnetic field - Answer -
Increasing the current flow , increasing the number of turns in the coil, placing an iron
core inside the coil, increasing the flux line density
