NCCER: Module
26201-11 Basic AC
Circuits Review
QUESTIONS &
ANSWERS(LATEST
UPDATE 2024)
An electric current always produces? - ANSWER a magnetic field
The number of cycles an alternating electric current undergoes per one-half second, the hurtz rating
of the circuit is? - ANSWER 30HZ
The period of a waveform is the ? - ANSWER inverse of the frequency
Which of the following conditions exist in a circuit of pure resistance? - ANSWER The voltage and
current are in phase.
Which of the following will cause the inductance of a coil to decrease? - ANSWER decreasing coil
diameter
Reactance increases with an increase in inductance - ANSWER TRUE
, Capacitance is measured in - ANSWER farads
the opposition to current flow offered by the capacitance of the circuit is known as - ANSWER
capacitive reactance
Current leads voltage by 90 degrees in a - ANSWER capacitive circuit
Which of the following conditions exist in a circuit of pure inductance - ANSWER the voltage and
current are 90 degrees out of phase
The total opposition to current flow in an AC circuit is know as - ANSWER Impedance
The formula, square root of r squared + X squared is used to solve for the - ANSWER total impedance
of an AC circuit
A power factor is not angular measure, but a numerical ration with a value between 0 and 1, equal to
the - ANSWER cosine of the phase angle
As in all series circuits, the ____ in a series LC circuit is the same at all points. - ANSWER current
the storage of electricity in a capacitor is - ANSWER capacitance
A condition reached in an electrical circuit when the inductive reactance neutralizes the capacitive
reluctance is - ANSWER resonance
A(n) _______ can be used to electrically isolate a piece of equipment from the power distribution
system. - ANSWER Isolation transformer
The opposition to current flow in an AC circuit is - ANSWER Impedance
26201-11 Basic AC
Circuits Review
QUESTIONS &
ANSWERS(LATEST
UPDATE 2024)
An electric current always produces? - ANSWER a magnetic field
The number of cycles an alternating electric current undergoes per one-half second, the hurtz rating
of the circuit is? - ANSWER 30HZ
The period of a waveform is the ? - ANSWER inverse of the frequency
Which of the following conditions exist in a circuit of pure resistance? - ANSWER The voltage and
current are in phase.
Which of the following will cause the inductance of a coil to decrease? - ANSWER decreasing coil
diameter
Reactance increases with an increase in inductance - ANSWER TRUE
, Capacitance is measured in - ANSWER farads
the opposition to current flow offered by the capacitance of the circuit is known as - ANSWER
capacitive reactance
Current leads voltage by 90 degrees in a - ANSWER capacitive circuit
Which of the following conditions exist in a circuit of pure inductance - ANSWER the voltage and
current are 90 degrees out of phase
The total opposition to current flow in an AC circuit is know as - ANSWER Impedance
The formula, square root of r squared + X squared is used to solve for the - ANSWER total impedance
of an AC circuit
A power factor is not angular measure, but a numerical ration with a value between 0 and 1, equal to
the - ANSWER cosine of the phase angle
As in all series circuits, the ____ in a series LC circuit is the same at all points. - ANSWER current
the storage of electricity in a capacitor is - ANSWER capacitance
A condition reached in an electrical circuit when the inductive reactance neutralizes the capacitive
reluctance is - ANSWER resonance
A(n) _______ can be used to electrically isolate a piece of equipment from the power distribution
system. - ANSWER Isolation transformer
The opposition to current flow in an AC circuit is - ANSWER Impedance
