Question 1

To solve RLC parallel circuits, the RL portion is usually solved first, and then the LC or RC portion is considered.

Accepted Answer

In RLC parallel circuits, each component (R, L, and C) is typically analyzed simultaneously rather than in a sequential manner like RL first, then LC or RC. The total impedance of the circuit is calculated by considering the individual impedances of the resistor (R), inductor (L), and capacitor (C) in parallel.

Question 2

An RL parallel circuit is a circuit with branches containing resistance and ____.&#10;A) capacitance&#10;B) hysteresis&#10;C) voltage&#10;D) inductance

Accepted Answer

An RL parallel circuit contains resistance and inductance in parallel branches. Capacitance is used in RC circuits, and hysteresis and voltage are not components of a circuit.

Question 3

A resonant circuit contains resistance, inductance, and ____.&#10;A) stress&#10;B) hysteresis&#10;C) capacitance&#10;D) reactance

Accepted Answer

A resonant circuit contains resistance, inductance, and capacitance.

Question 4

The combined resistance of an AC series circuit is equal to the ____ of the individual resistances of the circuit.&#10;A) sum&#10;B) difference&#10;C) product&#10;D) ratio

Accepted Answer

The combined resistance of an AC series circuit is equal to the sum of the individual resistances of the circuit. This can be represented by the formula Rtotal = R1 + R2 + R3 + ... + Rn, where Rtotal is the total resistance and R1, R2, R3, ..., Rn are the individual resistances in the circuit.

Question 5

In resonant circuits, at a certain frequency, the reactance of the coil is equal to the reactance of the capacitor, and the combined reactance is zero.

Accepted Answer

This is the definition of resonance in a series LC circuit.

Question 6

____ is a factor affecting the amount of current flowing in a pure resistive circuit?&#10;A) DC resistance&#10;B) inductance effect&#10;C) skin stress&#10;D) hysteresis currents

Accepted Answer

DC resistance is the only factor affecting the amount of current flowing in a pure resistive circuit. Inductance effect, skin stress, and hysteresis currents are not applicable to pure resistive circuits.

Question 7

Resistive heating units and incandescent lighting are considered to be pure resistive loads.

Accepted Answer

Resistive heating units and incandescent lighting are both devices that convert electrical energy into heat or light through the use of a resistor. This means that they have a purely resistive load, which can be characterized by a constant resistance that does not vary with frequency or other parameters. Other types of loads, such as capacitive or inductive loads, may exhibit a reactive component that can affect how they interact with the power source.

Question 8

For parallel AC circuits, at any instant, the current is the same value across all branches of a parallel AC circuit, and is equal to the supply current at that instant.

Accepted Answer

In parallel AC circuits, the current varies across different branches depending on the impedance of each branch. The total supply current is the vector sum of the currents in all branches, not the same current through each branch.

Question 9

The true power is also called effective power.

Accepted Answer

The true power, also known as active or real power, is the portion of power that performs actual work in an electrical circuit, hence it is sometimes referred to as effective power.

Question 10

____ are caused by voltages induced into the conductors and other surrounding metal parts.&#10;A) Hysteresis currents&#10;B) Skin currents&#10;C) Dielectric currents&#10;D) Eddy currents

Accepted Answer

The statement describes eddy currents which are caused by voltages induced into conductors and other surrounding metal parts. Hysteresis currents are caused by magnetic hysteresis while Skin currents are caused by the skin effect in conductors. Dielectric currents are caused by the charging and discharging of capacitors.

Question 11

The nameplate information on piece of electrical equipment includes the rating in kilovolt-amperes and/or kilowatts, voltage, amperes, and ____.&#10;A) static charge&#10;B) place of manufacture&#10;C) frequency&#10;D) resistance

Accepted Answer

The answer of The nameplate information on piece of electrical...

Question 12

____ are often more practical for power factor improvement than capacitors are because they can drive a mechanical load as well as develop a leading power factor.&#10;A) Synchronous motors&#10;B) Induction motors&#10;C) Feeder conductors&#10;D) Transformers

Accepted Answer

The answer of ____ are often more practical for power...

Question 13

When a circuit contains inductive components, these components contain both resistance and inductive ____.&#10;A) resistance&#10;B) reactance&#10;C) stress&#10;D) frequency

Accepted Answer

The answer of When a circuit contains inductive components, these...

Question 14

Most circuits contain more than pure resistance, pure inductance, or pure capacitance; therefore, each path of a parallel circuit must be treated as a separate ____ circuit.&#10;A) series&#10;B) parallel&#10;C) RC&#10;D) RL

Accepted Answer

The answer of Most circuits contain more than pure resistance,...

Question 15

Maintaining a(n) ____ power factor provides a more efficient operation.&#10;A) low&#10;B) high&#10;C) zero&#10;D) negative

Accepted Answer

The answer of Maintaining a(n) ____ power factor provides a...

Deck 8: Ac Circuits