ACDC ch. 17, 18

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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


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