Installer Technician Conventional UPDATED ACTUAL Questions And Correct
Answers
C
Terms in this set (202)
Which orbital shell has a maximum electron capacity of 18 Third
electrons?
Why are semiconductor materials not good conductors Valance shells are only half filled
nor good insulators?
What best describes a conductor? Elements that have a small number of electrons in the valence shell.
Which of the following best describes the relationship The number of amperes is equivalent to the number of coulombs passing a given
between an ampere and a coulomb? point during one second.
How is electric current produced? From the transfer of energy from valence electron to valence electron because of
applied charges.
What prevents the electrons that orbit an atom's nucleus The attraction between the positive nucleus and the negative electron.
at high speeds from breaking away from the nucleus due
to centrifugal force?
Elements without the production or movement of free Insulators
electrons are considered?
What best describes the type of electron flow called Electrons moving randomly because of competing continuous negative/positive
random drift? charges.
What is the effective speed of electric current? 186,000 miles per second.
An atom is______ when an equal number of its electrons non-magnetic
are spinning in opposite directions, causing the
cancellation of all the magnetic fields.
When exploring the Earth's magnetism, scientists realized not quite in the same location.
that the geographic and the magnetic poles in each
hemisphere were _____________________________ _.
________ soon became known as a leading stone or Magnetite
lodestone and was used as the first compass for
navigation.
Small groups of magnetic atoms which tend to form tiny Magnetic Domains
permanent magnets.
, The magnetic fields between two closely spaced parallel, permanent
________ wires conducting current interact with each
other in the same way that fields of __________ magnets
interact.
The ________ of the mmf determines the strength of the megnitude
field and the number of lines of flux in the field.
Electromagnet 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 a wire that is conducting weaker because the flux lines are further apart
current become stronger or weaker as the distance from
the wire increases?
How do the magnetic fields between two closely spaced They will add together because the flux lines will go in the same direction,
parallel wires that are conducting current interact with forming loops around the wires. The flux lines will attract one another, causing the
each other if the current flow in both wires is in the same wires to draw together.
direction?
Why is the overall magnetic field created by forming flux lines are concentrated in the center or core of the loops.
loops of wire stronger
Loudspeaker The first magnetic field on this device is a strong, nonmoving magnetic field
generated by a permanent magnet. The second magnetic field results from the
application of current generated by a sound wave to a small coil of wire, known as
the voice coil.
Analog Meter This device uses electromagnetic effects to measure the amount of current in a
wire or circuit.
Reed Relay Under normal conditions the contacts on these devices are in an open position,
not touching each other. But in the presence of a magnetic field the contacts
close, thus functioning as a switch.
The amount and direction of rotation of the needle proportional
pointer in a D'Arsonval meter movement are __________ to
the amount and direction of the applied current.
What is another way to create an electromagnet besides Wrap a coil of insulated wire around an iron bar and pass an electric current
stroking a piece of magnetic metal, such as a piece of through the wire.
iron with another magnet?
What is true about magnetism? Magnetism was discovered when the Greeks noticed that certain stones attract
iron.
What happens in a magnetic material where some of the The magnetic field is weaker.
magnetic domains are pointing in the same direction?
What determines the strength of an electromagnetic The magnitude of the mmf
field?
Answers
C
Terms in this set (202)
Which orbital shell has a maximum electron capacity of 18 Third
electrons?
Why are semiconductor materials not good conductors Valance shells are only half filled
nor good insulators?
What best describes a conductor? Elements that have a small number of electrons in the valence shell.
Which of the following best describes the relationship The number of amperes is equivalent to the number of coulombs passing a given
between an ampere and a coulomb? point during one second.
How is electric current produced? From the transfer of energy from valence electron to valence electron because of
applied charges.
What prevents the electrons that orbit an atom's nucleus The attraction between the positive nucleus and the negative electron.
at high speeds from breaking away from the nucleus due
to centrifugal force?
Elements without the production or movement of free Insulators
electrons are considered?
What best describes the type of electron flow called Electrons moving randomly because of competing continuous negative/positive
random drift? charges.
What is the effective speed of electric current? 186,000 miles per second.
An atom is______ when an equal number of its electrons non-magnetic
are spinning in opposite directions, causing the
cancellation of all the magnetic fields.
When exploring the Earth's magnetism, scientists realized not quite in the same location.
that the geographic and the magnetic poles in each
hemisphere were _____________________________ _.
________ soon became known as a leading stone or Magnetite
lodestone and was used as the first compass for
navigation.
Small groups of magnetic atoms which tend to form tiny Magnetic Domains
permanent magnets.
, The magnetic fields between two closely spaced parallel, permanent
________ wires conducting current interact with each
other in the same way that fields of __________ magnets
interact.
The ________ of the mmf determines the strength of the megnitude
field and the number of lines of flux in the field.
Electromagnet 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 a wire that is conducting weaker because the flux lines are further apart
current become stronger or weaker as the distance from
the wire increases?
How do the magnetic fields between two closely spaced They will add together because the flux lines will go in the same direction,
parallel wires that are conducting current interact with forming loops around the wires. The flux lines will attract one another, causing the
each other if the current flow in both wires is in the same wires to draw together.
direction?
Why is the overall magnetic field created by forming flux lines are concentrated in the center or core of the loops.
loops of wire stronger
Loudspeaker The first magnetic field on this device is a strong, nonmoving magnetic field
generated by a permanent magnet. The second magnetic field results from the
application of current generated by a sound wave to a small coil of wire, known as
the voice coil.
Analog Meter This device uses electromagnetic effects to measure the amount of current in a
wire or circuit.
Reed Relay Under normal conditions the contacts on these devices are in an open position,
not touching each other. But in the presence of a magnetic field the contacts
close, thus functioning as a switch.
The amount and direction of rotation of the needle proportional
pointer in a D'Arsonval meter movement are __________ to
the amount and direction of the applied current.
What is another way to create an electromagnet besides Wrap a coil of insulated wire around an iron bar and pass an electric current
stroking a piece of magnetic metal, such as a piece of through the wire.
iron with another magnet?
What is true about magnetism? Magnetism was discovered when the Greeks noticed that certain stones attract
iron.
What happens in a magnetic material where some of the The magnetic field is weaker.
magnetic domains are pointing in the same direction?
What determines the strength of an electromagnetic The magnitude of the mmf
field?
