Installer Technician UPDATED ACTUAL Questions And Correct Answers
C
Terms in this set (149)
20 milliamperes is the same as _______ (remember 1 0.02 amperes
milliampere = .001
The orbital shell that has a maximum electron capacity of Third
18 electrons is the ________ shell
A semiconductor material Has four valence electrons.
The major factor for determining whether a particular The number of electrons in the valence shell.
elements is a conductor, a semiconductor, or an insulator
is
Elements that are called conductors Have very few valence electrons
The term voltage normally refers to The measurement of the difference in potential between two charges
Indicates how many coulombs pass a given point during 1 The ampere
second
Electric current is actually produced by The transfer of energy from valence electron to valence electron as a result 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?
5 kilovolts is the same as 5 kV
To create an electromagnet Wrap a coil of insulated wire around an iron bar and pass an electric current
through the wire
Magnetism Where only some of the magnetic domains are pointing in the same direction, the
magnetic field is weaker
Where only some of the magnetic domains are pointing In magnetic material
in the same direction, the magnetic field is weaker
The strength of an electromagnetic field is Determined by the magnitude of the magnetomotive force (mmf)
The magnetic field Created by a straight piece of wire is weaker than that created by forming loops
of wire
, Flux lines Always curve around through the body of the magnet to form complete loops
Magnetic poles that are _________ will _______ each other Alike, repel
when those poles are near each other
A permanent-magnet loudspeaker Has a cone that moves back and forth in relation to the varying current of the
original sound
the left-hand rule for electromagnetism in a wire states If you wrap the fingers of your left hand around the wire with your thumb pointing
that in the direction of the current flow, your fingers will be wrapped in the direction of
the magnetic field
the recording head of a tape recorder is actually an Electromagnet
What are the three basic elements of an electrical circuit? A power source, a load, and the connecting conductor
The power source is the part of an electrical circuit that provides a difference of potential
The load Is the part of the electrical circuit that uses the electrical energy provided by the
power source to carry out some desired function
A conductor Provides a path for the current flow from the power source to the load and from
the load back to the power source
The metal that has the greatest conductance is Silver
Normal current flow results When the circuit operates properly and no damage occurs to the circuit
components
Excessive current flow Is often the result of the failure of a small part within a larger circuit
Direct current Flow is a continuous electron flow in the same direction
Which of the following is a correct definition for a type of A block diagram is a simplified outline of an electrical system that shows circuits
circuit graphic? or parts as rectangles and other shapes.
A symbol is a simple line design used to represent a component or device in a schematic
circuit diagram
Resistance Doubles when the length of a conductor doubles
Load resistance Is considered to be the total resistance when the source and wire resistances are
very small
which is true The resistance of a material with a negative temperature coefficient will decrease
as the temperature increases
The resistance of a conductor increases as The cross-sectional area of a conductor decreases
C
Terms in this set (149)
20 milliamperes is the same as _______ (remember 1 0.02 amperes
milliampere = .001
The orbital shell that has a maximum electron capacity of Third
18 electrons is the ________ shell
A semiconductor material Has four valence electrons.
The major factor for determining whether a particular The number of electrons in the valence shell.
elements is a conductor, a semiconductor, or an insulator
is
Elements that are called conductors Have very few valence electrons
The term voltage normally refers to The measurement of the difference in potential between two charges
Indicates how many coulombs pass a given point during 1 The ampere
second
Electric current is actually produced by The transfer of energy from valence electron to valence electron as a result 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?
5 kilovolts is the same as 5 kV
To create an electromagnet Wrap a coil of insulated wire around an iron bar and pass an electric current
through the wire
Magnetism Where only some of the magnetic domains are pointing in the same direction, the
magnetic field is weaker
Where only some of the magnetic domains are pointing In magnetic material
in the same direction, the magnetic field is weaker
The strength of an electromagnetic field is Determined by the magnitude of the magnetomotive force (mmf)
The magnetic field Created by a straight piece of wire is weaker than that created by forming loops
of wire
, Flux lines Always curve around through the body of the magnet to form complete loops
Magnetic poles that are _________ will _______ each other Alike, repel
when those poles are near each other
A permanent-magnet loudspeaker Has a cone that moves back and forth in relation to the varying current of the
original sound
the left-hand rule for electromagnetism in a wire states If you wrap the fingers of your left hand around the wire with your thumb pointing
that in the direction of the current flow, your fingers will be wrapped in the direction of
the magnetic field
the recording head of a tape recorder is actually an Electromagnet
What are the three basic elements of an electrical circuit? A power source, a load, and the connecting conductor
The power source is the part of an electrical circuit that provides a difference of potential
The load Is the part of the electrical circuit that uses the electrical energy provided by the
power source to carry out some desired function
A conductor Provides a path for the current flow from the power source to the load and from
the load back to the power source
The metal that has the greatest conductance is Silver
Normal current flow results When the circuit operates properly and no damage occurs to the circuit
components
Excessive current flow Is often the result of the failure of a small part within a larger circuit
Direct current Flow is a continuous electron flow in the same direction
Which of the following is a correct definition for a type of A block diagram is a simplified outline of an electrical system that shows circuits
circuit graphic? or parts as rectangles and other shapes.
A symbol is a simple line design used to represent a component or device in a schematic
circuit diagram
Resistance Doubles when the length of a conductor doubles
Load resistance Is considered to be the total resistance when the source and wire resistances are
very small
which is true The resistance of a material with a negative temperature coefficient will decrease
as the temperature increases
The resistance of a conductor increases as The cross-sectional area of a conductor decreases
