NCCER Electrical Module 26103-
20 FINAL EXAM STUDY GUIDE
2025/2026 COMPLETE
QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100%
GUARANTEED PASS <RECENT
VERSION>
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. - 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. -
ANSWER Charged
The term ___ can be taken to mean a quantity of electricity that
is either positive or negative. - 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. - ANSWER Centrifugal, Electrostatic
A proton (+) ____ another proton (+) - ANSWER Repels
An electron (-) ___ another electron (-) - ANSWER Repels
,A proton (+) ___ an electron (-) - 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. - 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 ___. -
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. - 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 . -
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. - ANSWER
Lose
When it comes to electricity, the ___ electrons are of the most
concern. - ANSWER Valence
All of the elements that make up matter may be placed into one
of three categories: ___, ____, and ____. - ANSWER
Conductors, insulators and semiconductors
Usually, a ___ has three or or fewer valence electrons -
ANSWER Conductor
, An ___ has five or more valence electrons. - ANSWER
Insulator
A ___ has four valence electrons. - ANSWER Semiconductor
Germanium and silicon are examples of ____. - ANSWER
Semiconductors
The operation of many electrical components relies on the
power of ____. Motors, relays, transformers, and solenoids are
examples. - ANSWER Magnetism
Electricity also produces magnetism. Current flowing through a
conductor produces a small magnetic field around the conductor.
- 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. - ANSWER Coal-burning, nuclear power
plants
The electrical power that travels through long distance
transmission lines may be as high as ______ V. - ANSWER
750,000
The voltage you receive at home is usually about ___ V. -
ANSWER 240
An atom with seven valence electrons is most likely a(n) ____.
- ANSWER Insulator
Current flowing through a conductor coiled around an iron bar
produces a(n)____. - ANSWER Electromagnet
20 FINAL EXAM STUDY GUIDE
2025/2026 COMPLETE
QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100%
GUARANTEED PASS <RECENT
VERSION>
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. - 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. -
ANSWER Charged
The term ___ can be taken to mean a quantity of electricity that
is either positive or negative. - 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. - ANSWER Centrifugal, Electrostatic
A proton (+) ____ another proton (+) - ANSWER Repels
An electron (-) ___ another electron (-) - ANSWER Repels
,A proton (+) ___ an electron (-) - 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. - 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 ___. -
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. - 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 . -
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. - ANSWER
Lose
When it comes to electricity, the ___ electrons are of the most
concern. - ANSWER Valence
All of the elements that make up matter may be placed into one
of three categories: ___, ____, and ____. - ANSWER
Conductors, insulators and semiconductors
Usually, a ___ has three or or fewer valence electrons -
ANSWER Conductor
, An ___ has five or more valence electrons. - ANSWER
Insulator
A ___ has four valence electrons. - ANSWER Semiconductor
Germanium and silicon are examples of ____. - ANSWER
Semiconductors
The operation of many electrical components relies on the
power of ____. Motors, relays, transformers, and solenoids are
examples. - ANSWER Magnetism
Electricity also produces magnetism. Current flowing through a
conductor produces a small magnetic field around the conductor.
- 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. - ANSWER Coal-burning, nuclear power
plants
The electrical power that travels through long distance
transmission lines may be as high as ______ V. - ANSWER
750,000
The voltage you receive at home is usually about ___ V. -
ANSWER 240
An atom with seven valence electrons is most likely a(n) ____.
- ANSWER Insulator
Current flowing through a conductor coiled around an iron bar
produces a(n)____. - ANSWER Electromagnet
