NCATT AET EXAM: 100% EXPERT VERIFIED STUDY GUIDE
REAL TESTING 2026|2027 QUESTIONS DETAILED
ANSWERS AND INSTRUCTOR NOTE FOR A+
GUARANTEED PASS
Kirchoffs Voltage Law - Answers -the algebraic sum of all the voltave drops in any closed circuit
is equal to zero
Total voltage used by all the resistors - Answers -will equal the total voltage applied
Kirchoffs Voltage Law is also known as - Answers -Kirchoffs second law, Kirchoffs Loop Rule,
Kirchoffs Second Rule
The sum of all the voltages around the loop - Answers -is equal to the applied voltage
Bridge Circuit - Answers -contains four impedances or resistances that form a square
Bridge Circuit is a type of electrical circuit - Answers -in which the current in a conductor split
into two parallel paths and then recombines into a single conductor thereby enclosing a loop.
1|Page
,A bridge circuit was originally used for - Answers -measurement purposes
Best known bridge circuit - Answers -Wheatstone Bridge
Wheatstone Bridge construction - Answers -Arranged in a square four resistors, two that have a
fixed or equal value on top, on the bottom one is equal to the top resistors and one has a
variable value. The corners are connected to electrical source with a galvanometer connected
across the opposite corners. The variable resistors is connected until the galvanometer reads
zero. Thus showing the ratio of the variable resistor and its neighbor is equal to the ratio of the
unknown resistor and its neighbor
The familiar battery symbol is a generic symbol for - Answers -any DC voltage source
The circle with the wavy line inside is - Answers -a generic symbol for any AC voltage source
With AC it is possible to build - Answers -electric generators, motors, and power distribution
systems that are far more efficient than DC
AC is used predominately for - Answers -high power applications
2|Page
,DC generator construction - Answers -the coil of wire is mounted on the shaft where the
magnet is on the AC alternator. Electrical connections are made to this spinning coil via
stationary carbon brushes containing copper strips on the rotating shaft. This allows for
constant polarity but the amplitude will vary as the rotor rotates
For a DC generator to produce constant voltage - Answers -there are multiple sets of coils
making intermittent contact with the brushes
Problems involved with using brushes - Answers -sparking, heat, and wasted energy
An AC generator does not require - Answers -burshes and commutators to work
In the USA, the standard power line frequency is - Answers -60 hertz
In Europe, the standard power line frequency is - Answers -50 Hertz
Oscilloscope - Answers -used to display changing voltage over time on a graphical screen
ECG - Answers -special purpose oscilloscope expressly designed for medical use
3|Page
, General purpose oscilloscope - Answers -have the ability to display voltage from virtually any
voltage source plotted as a graph with time as the independent variable
You can determine the frequency in Hertz - Answers -by measuring the period on the wave on
the horizontal axis of the oscilloscope screen and reciprocating that time value in seconds
Provides an excellent analogy for relating AC concepts - Answers -sound waves, especially music
Frequency is equivalent to - Answers -pitch
Pure waves - Answers -Square, triangle, or saw tooth voltage/current wave forms that real life
often distorts
Nonsinusodial wave - Answers -waveshape that does not bear a close resemblance to a perfect
sine wave
The devices in a circuit - Answers -are the source for each type of wave
A square wave could be produced by - Answers -a transitor acting as a switch
4|Page
REAL TESTING 2026|2027 QUESTIONS DETAILED
ANSWERS AND INSTRUCTOR NOTE FOR A+
GUARANTEED PASS
Kirchoffs Voltage Law - Answers -the algebraic sum of all the voltave drops in any closed circuit
is equal to zero
Total voltage used by all the resistors - Answers -will equal the total voltage applied
Kirchoffs Voltage Law is also known as - Answers -Kirchoffs second law, Kirchoffs Loop Rule,
Kirchoffs Second Rule
The sum of all the voltages around the loop - Answers -is equal to the applied voltage
Bridge Circuit - Answers -contains four impedances or resistances that form a square
Bridge Circuit is a type of electrical circuit - Answers -in which the current in a conductor split
into two parallel paths and then recombines into a single conductor thereby enclosing a loop.
1|Page
,A bridge circuit was originally used for - Answers -measurement purposes
Best known bridge circuit - Answers -Wheatstone Bridge
Wheatstone Bridge construction - Answers -Arranged in a square four resistors, two that have a
fixed or equal value on top, on the bottom one is equal to the top resistors and one has a
variable value. The corners are connected to electrical source with a galvanometer connected
across the opposite corners. The variable resistors is connected until the galvanometer reads
zero. Thus showing the ratio of the variable resistor and its neighbor is equal to the ratio of the
unknown resistor and its neighbor
The familiar battery symbol is a generic symbol for - Answers -any DC voltage source
The circle with the wavy line inside is - Answers -a generic symbol for any AC voltage source
With AC it is possible to build - Answers -electric generators, motors, and power distribution
systems that are far more efficient than DC
AC is used predominately for - Answers -high power applications
2|Page
,DC generator construction - Answers -the coil of wire is mounted on the shaft where the
magnet is on the AC alternator. Electrical connections are made to this spinning coil via
stationary carbon brushes containing copper strips on the rotating shaft. This allows for
constant polarity but the amplitude will vary as the rotor rotates
For a DC generator to produce constant voltage - Answers -there are multiple sets of coils
making intermittent contact with the brushes
Problems involved with using brushes - Answers -sparking, heat, and wasted energy
An AC generator does not require - Answers -burshes and commutators to work
In the USA, the standard power line frequency is - Answers -60 hertz
In Europe, the standard power line frequency is - Answers -50 Hertz
Oscilloscope - Answers -used to display changing voltage over time on a graphical screen
ECG - Answers -special purpose oscilloscope expressly designed for medical use
3|Page
, General purpose oscilloscope - Answers -have the ability to display voltage from virtually any
voltage source plotted as a graph with time as the independent variable
You can determine the frequency in Hertz - Answers -by measuring the period on the wave on
the horizontal axis of the oscilloscope screen and reciprocating that time value in seconds
Provides an excellent analogy for relating AC concepts - Answers -sound waves, especially music
Frequency is equivalent to - Answers -pitch
Pure waves - Answers -Square, triangle, or saw tooth voltage/current wave forms that real life
often distorts
Nonsinusodial wave - Answers -waveshape that does not bear a close resemblance to a perfect
sine wave
The devices in a circuit - Answers -are the source for each type of wave
A square wave could be produced by - Answers -a transitor acting as a switch
4|Page
