NCCER Electrical Module 26103-20 Questions And Verified Correct answers
An electrical circuit contains, at minimum 3 components to carry the electrical current. The
circuit should also have a means to stop and start the current, such as a switch. - correct
answer Voltage source, a load and conductors (wires)
The atom is the smallest part of an element that enters into a chemical change, but it does so in
the form of a _____ particle. - correct answer Charged
The term ___ can be taken to mean a quantity of electricity that is either positive or negative. -
correct answer Charge
A hydrogen atom is composed of a nucleus containing one proton and a single orbiting
electron. As the electron evolves around the nucleus, it is held in this orbit by two
counteracting forces. One of these forces is called ___ force, which is the force that tends to
cause the electron to fly outward as it travels around its circular orbit. The second force acting
upon the electron is ___ force, which pulls the electron towards the nucleus. - correct answer
Centrifugal, Electrostatic
A proton (+) ____ another proton (+) - correct answer Repels
An electron (-) ___ another electron (-) - correct answer Repels
A proton (+) ___ an electron (-) - correct answer Attracts
The difference between atoms, with respect to chemical activity and stability, depends on the
___ and ___ of the electrons included within the atom. In general, the electrons reside in
groups of orbits called shells. The shells are arranged in steps that correspond to fixed energy
levels. - correct answer Number and position
The outer shell of an atom is called the valence shell, and the electrons contained in this shell
are called valence ___. - correct answer electrons
The number of ___ electrons determines an atom's ability to gain or lose an electron, which in
turn determines the chemical and electrical properties of the atom. - correct answer Valence
An atom that is lacking only one or two electrons from its outer shell will ___ gain electrons to
complete its shell, but a large amount of energy is required to free any of its electrons . -
correct answer Easily
An atom having a relatively small number of electrons in its outer shell in comparison to the
number of electrons required to fill the shell will easily ___ these valence electrons. - correct
answer Lose
When it comes to electricity, the ___ electrons are of the most concern. - correct answer
Valence
All of the elements that make up matter may be placed into one of three categories: ___, ____,
and ____. - correct answer Conductors, insulators and semiconductors
, NCCER Electrical Module 26103-20 Questions And Verified Correct answers
Usually, a ___ has three or or fewer valence electrons - correct answer Conductor
An ___ has five or more valence electrons. - correct answer Insulator
A ___ has four valence electrons. - correct answer Semiconductor
Germanium and silicon are examples of ____. - correct answer Semiconductors
The operation of many electrical components relies on the power of ____. Motors, relays,
transformers, and solenoids are examples. - correct answer Magnetism
Electricity also produces magnetism. Current flowing through a conductor produces a small
magnetic field around the conductor. - correct answer
Electricity comes from electrical generating plants operated by utilities like your local power
company. Steam from ____, or _____ is used to power huge generators called turbines, which
generate electricity. - correct answer Coal-burning, nuclear power plants
The electrical power that travels through long distance transmission lines may be as high as
______ V. - correct answer 750,000
The voltage you receive at home is usually about ___ V. - correct answer 240
An atom with seven valence electrons is most likely a(n) ____. - correct answer Insulator
Current flowing through a conductor coiled around an iron bar produces a(n)____. - correct
answer Electromagnet
The voltage used by a typical T.V. or toaster is _____. - correct answer 120 V
The movement of the flow of electrons is called ____. - correct answer Current
Electrical current is often represented by the letter ____. - correct answer I
The basic unit in which current is measure is ____. - correct answer Amperes (A)
One ampere of current is defined as the movement of 1 ____ of charge past any point of a
conductor in a second. - correct answer Coulomb
Electrical current is a rate, which can be defined as an equation: - correct answer I=Q/T
An electrical charge has the ability to do the work of moving another charge by _____ or ____. -
correct answer Attraction, repulsion
The ability of a charge to do work is called its ____. - correct answer Potential
When one charge is different from another, there is a difference in potential between them.
The ____ of the difference of potential of all the charges in the electrostatic field is referred to
as the potential difference, electromotive force (EMF) , or voltage. - correct answer Sum
An electrical circuit contains, at minimum 3 components to carry the electrical current. The
circuit should also have a means to stop and start the current, such as a switch. - correct
answer Voltage source, a load and conductors (wires)
The atom is the smallest part of an element that enters into a chemical change, but it does so in
the form of a _____ particle. - correct answer Charged
The term ___ can be taken to mean a quantity of electricity that is either positive or negative. -
correct answer Charge
A hydrogen atom is composed of a nucleus containing one proton and a single orbiting
electron. As the electron evolves around the nucleus, it is held in this orbit by two
counteracting forces. One of these forces is called ___ force, which is the force that tends to
cause the electron to fly outward as it travels around its circular orbit. The second force acting
upon the electron is ___ force, which pulls the electron towards the nucleus. - correct answer
Centrifugal, Electrostatic
A proton (+) ____ another proton (+) - correct answer Repels
An electron (-) ___ another electron (-) - correct answer Repels
A proton (+) ___ an electron (-) - correct answer Attracts
The difference between atoms, with respect to chemical activity and stability, depends on the
___ and ___ of the electrons included within the atom. In general, the electrons reside in
groups of orbits called shells. The shells are arranged in steps that correspond to fixed energy
levels. - correct answer Number and position
The outer shell of an atom is called the valence shell, and the electrons contained in this shell
are called valence ___. - correct answer electrons
The number of ___ electrons determines an atom's ability to gain or lose an electron, which in
turn determines the chemical and electrical properties of the atom. - correct answer Valence
An atom that is lacking only one or two electrons from its outer shell will ___ gain electrons to
complete its shell, but a large amount of energy is required to free any of its electrons . -
correct answer Easily
An atom having a relatively small number of electrons in its outer shell in comparison to the
number of electrons required to fill the shell will easily ___ these valence electrons. - correct
answer Lose
When it comes to electricity, the ___ electrons are of the most concern. - correct answer
Valence
All of the elements that make up matter may be placed into one of three categories: ___, ____,
and ____. - correct answer Conductors, insulators and semiconductors
, NCCER Electrical Module 26103-20 Questions And Verified Correct answers
Usually, a ___ has three or or fewer valence electrons - correct answer Conductor
An ___ has five or more valence electrons. - correct answer Insulator
A ___ has four valence electrons. - correct answer Semiconductor
Germanium and silicon are examples of ____. - correct answer Semiconductors
The operation of many electrical components relies on the power of ____. Motors, relays,
transformers, and solenoids are examples. - correct answer Magnetism
Electricity also produces magnetism. Current flowing through a conductor produces a small
magnetic field around the conductor. - correct answer
Electricity comes from electrical generating plants operated by utilities like your local power
company. Steam from ____, or _____ is used to power huge generators called turbines, which
generate electricity. - correct answer Coal-burning, nuclear power plants
The electrical power that travels through long distance transmission lines may be as high as
______ V. - correct answer 750,000
The voltage you receive at home is usually about ___ V. - correct answer 240
An atom with seven valence electrons is most likely a(n) ____. - correct answer Insulator
Current flowing through a conductor coiled around an iron bar produces a(n)____. - correct
answer Electromagnet
The voltage used by a typical T.V. or toaster is _____. - correct answer 120 V
The movement of the flow of electrons is called ____. - correct answer Current
Electrical current is often represented by the letter ____. - correct answer I
The basic unit in which current is measure is ____. - correct answer Amperes (A)
One ampere of current is defined as the movement of 1 ____ of charge past any point of a
conductor in a second. - correct answer Coulomb
Electrical current is a rate, which can be defined as an equation: - correct answer I=Q/T
An electrical charge has the ability to do the work of moving another charge by _____ or ____. -
correct answer Attraction, repulsion
The ability of a charge to do work is called its ____. - correct answer Potential
When one charge is different from another, there is a difference in potential between them.
The ____ of the difference of potential of all the charges in the electrostatic field is referred to
as the potential difference, electromotive force (EMF) , or voltage. - correct answer Sum
