ACDC ch. 17, 18
T or F Inductive and capacitive branches of a circuit have no resistance.
F
A circuit where all inductive, resistive, and capacitive circuit elements are connected in one current path is known as a series ________ circuit.
Inductive resistive capacitive
T or F Resistive current is in phase with source voltage in a parallel resitive-capacitive circuit
T
T or F The pythagorean theorem can be used to calculate the source current in a parallel resistive-capacitive circuit.
T
T or F When a series circuit is capactive, line current leads the source voltage.
T
T or F When a series circuit is inductive, the current lags the source voltage.
T
Reactive power values are _______ degrees out of phase
180
Since an inductive reactance and a capacitive reactance are _______" out of phase with each other, they can be added together.
180
In a capacitive circuit, circuit current leads the source voltage by _________ '.
90
In a pure capacitive circuit, current leads the source voltage by _________ degrees
90
_________ is calculated by calculating the voltage ratio value and then determining the angle for which the tangent ratio is valid.
Angle theta
T or F A change in impedance also causes a change in capacitive reactance.
F
T or F Adding capacitance to an AC series circuit increases the circuit current
F
T or F Current is used as the reference in a parallel inductive-resistive-capacitive circuit.
F
T or F Frequency does not affect capacitive reactance.
F
T or F In a parallel inductive-resistive-capacitive circuit, a leading current indicates an inductive circuit.
F
T or F In a series resitive-capacitive circuit, impedance is the combination of inductance and capacitive reactance to oppose the flow of voltage.
F
T or F In pure capacitive circuit, the capacitor uses energy to charge, and half of this energy is returned to the circuit when the capacitor discharges.
F
T or F Increasing the frequency in a parallel inductive-resistive-capacitive circuit causes current flow to increase in the inductive branch.
F
T or F Series/parallel resistive-capacitive circuits should not be used for electronics applications
F
T or F When a load is a series resistive-capacitive combination, current flow is initially at its minimum value.
F
T or F When the reactive and resistive values of components are given, impedance in a parallel resitive-capacitive circuit can be calculated by using the vector diagram method.
F
T or F When the values of circuit resistance and capacitive reactance are known, total impedance in a series resistive-capacitive circuit can be calculated by using Ohm's law.
F
T or F total reactive power can be calculated by subtracting the inductive power vector from the capactive power vector
F
Series/parallel inductive-resistive-capacitive circuits are usually analyzed to calculate all of the following except _________.
Frequency
Dividing source voltage by the total circuit current yields _________
Impedance
Ohm's law is used to calculate _________ by dividing the source voltage by the total circuit current
Impedance
in a inductive-resistive-capacitive circuit, circuit current is equal to source voltage divided by circuit __________.
Impedance
The vector diagram calculation method or the ________ can be used to calculate total current in a series/parallel inductive-resistive-capacitance circuit.
Pythagorean theorem
With an inductive or capacitive circuit, inductance and capacitance present an opposition to current flow known as ________.
Reactance
In a parallel resistive-capacitive circuit, frequency has no effect on source voltage or _________
Resistance
In a series resistive-capacitive circuit, only _________ can dissipate true power.
Resistance
In a _________ circuit, resistive voltage drop is in phase with current (IR) while capacitive voltage drop lags current (IC) by 90 degrees
Series/parallel resistive capacitive
Capacitive voltage is equal to the _________ voltage at all times in a closed loop circuit.
Source
Without taking any measurements, values that are typically known in a parallel inductive-resistive-capacitive circuit are the ________ and component values.
Source voltage
_________ is the same across the capacitive load.
Source voltage
T or F A pure capacitive circuit is theoretical because it involves no resistance
T
T or F Angle theta is the angle by which current leads the source voltage.
T
T or F As capacitive reactance increases, circuit impedance increases.
T
T or F Changes in circuit parameters in both series and parallel resistores-capactive circuits vary with an increase or decrease in frequency or capacitance.
T
T or F Current is often reduced to its vertical and horizontal components in order to calculate total line current.
T
T or F Frequency must be known in order to calculate inductive reactance
T
T or F In a capacitor, consumed power has a positive value, while power returned to a circuit is negative.
T
T or F In a series resistive AC circuit, source voltage and line current are in phase with each other.
T
T or F In a simple series circuit, current is the reference point.
T
T or F In an inductive-resistive circuit, apparent power is lagging, indicating inductance
T
T or F Parallel resistive-capacitive circuits are used in electronic AC applications such as computers, CD-ROM players, DVD players, DVR equipment, amplifiers, stereo receivers, oscilloscopes, and video production equipment.
T
T or F Power in a pure capacitive circuit is the equivalent of reactive power in a capacitive circuit
T
T or F When analyzing parallel inductive-resistive-capacitive circuits, it is assumed that each branch is purely inductive, capacitive, or resistive.
T
T or F in a parallel inductive-resistive-capacitve circuit, the power factor is equal to the true power divided by the apparent power.
T
T or F the resistive branch circuit only opposes current flow.
T
T or F Capacitive reactance is inversely proportional to frequency (in Hz) and capacitance (in F)
T
A power _________ diagram is used to calculate apparent power in a parallel inductive-resistive-capacitive circuit.
Vector
Resistive branch circuit current is in phase with resistive branch circuit ______.
Voltage
_________ is the same across all branch circuits of a parallel inductive-resistive-capacitive circuit.
Voltage
In any series resitive capacitive circuit, the resistive current and the _________ across the resistor are in phase
Voltage drop
In a series circuit, inductive reactance is larger than capacitive reactance, then the circuit is _______.
inductive
Capacitive reactance is _________ proportional to frequency
inversely
Capacitive reactance is measured in _________.
ohms
In a series resistive-capactive circuit _________ leads current and source voltage, indicating capacitance.
Apparent power
The _______ in a parallel inductive-resistive-capacitive circuit is equal to the line current multiplied by the source voltage.
Apparent power
When the values of source voltage and total current are known, _________ in a series resitive-capactive circuit can be calculated by multiplying the voltage and current.
Apparent power
Increasing the amount of _________ in series resistive-capacitive circuits reduces the amount of capactive reactance.
Capacitance
________ reactance is the opposition to current flow by a capacitor.
Capacitive
If frequency is changed in a series resistive-capacitive circuit, the only parameter directly affected is _________.
Capacitive reactance
When frequency is changed, the only parameter directly affected is the _________, while the other parameters are indirectly affected by the change.
Capacitive reactance
A change in capacitive reactance results in different capacitive _________ in each branch circuit of a parallel resistive-capacitive circuit.
Current
When analyzing a series circuit, _______ is used as a reference for all other circuit parameters.
Current
_________ in a series resistive-capacitive circuit is the same at all points for all components and devices.
Current
_________ is the same throughout the circuit of a series inductive-resistive-capacitive circuit.
Current
in a series/parallel resistive-capacitive circuit, _________ is used as the reference point for the series components
Current
