NCCER Electrical Module 26103-20 -Solved
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)
One ampere of current is defined as the movement of 1 ____ of charge past any
point of a conductor in a second. - ANSWER-Coulomb
Electrical current is a rate, which can be defined as an equation: - ANSWER-I=Q/T
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)
One ampere of current is defined as the movement of 1 ____ of charge past any
point of a conductor in a second. - ANSWER-Coulomb
Electrical current is a rate, which can be defined as an equation: - ANSWER-I=Q/T
