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. -
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
/.The voltage used by a typical T.V. or toaster is _____. - Answer-120 V
/.The movement of the flow of electrons is called ____. - Answer-Current
/.Electrical current is often represented by the letter ____. - Answer-I
/.The basic unit in which current is measure is ____. - Answer-Amperes (A)
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. -
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
/.The voltage used by a typical T.V. or toaster is _____. - Answer-120 V
/.The movement of the flow of electrons is called ____. - Answer-Current
/.Electrical current is often represented by the letter ____. - Answer-I
/.The basic unit in which current is measure is ____. - Answer-Amperes (A)
