Question 1

For any inductor, the induced voltage remains constant if

Accepted Answer

A)  the rate of current change is varied 
B)  the rate of current change is constant 
C)  it is part of a series circuit 
D)  it is part of a parallel circuit 
A)  the rate of current change is varied 
B)  the rate of current change is constant 
C)  it is part of a series circuit 
D)  it is part of a parallel circuit B

Question 2

When series voltage drops that are out of phase are combined, they cannot be added without taking the phase difference into account.

Accepted Answer

A) True 
 B)False  True

Question 3

How much is ZT for a 100 ? R in series with a 100 ? inductor?

Accepted Answer

A)  100 ? 
B)  1000 ? 
C)  1410 ? 
D)  141 ? 
A)  100 ? 
B)  1000 ? 
C)  1410 ? 
D)  141 ? D

Question 4

In a series RL circuit, the voltage drops VR and VL are

Accepted Answer

A)  90° out of phase 
B)  in phase 
C)  120° out of phase 
D)  45° out of phase 
A)  90° out of phase 
B)  in phase 
C)  120° out of phase 
D)  45° out of phase

Question 5

A trigonometric function of any angle of a right triangle, equal to the ratio of the opposite side to the adjacent side of a triangle is the

Accepted Answer

A)  sine 
B)  cosine 
C)  tangent 
D)  cotangent 
A)  sine 
B)  cosine 
C)  tangent 
D)  cotangent

Question 6

In phasor triangles for volts and ohms in a series circuit, the phasor for R, IR, or VR is used as a reference at 0°.

Accepted Answer

A) True 
 B)False

Question 7

A ______________ is an inductance in series with an external R to prevent the ac signal voltage from developing any appreciable output across R at the frequency of the source.

Accepted Answer

The answer of A ______________ is an inductance in series...

Question 8

For any inductor, the induced voltage remains ______________ if the rate of current change is constant.

Accepted Answer

The answer of For any inductor, the induced voltage remains...

Question 9

Typically, the lower the internal resistance of a coil, the ______________ its Q.

Accepted Answer

The answer of Typically, the lower the internal resistance of...

Question 10

A cosine wave has its maximum values at 90° and 270° and its minimum values at 0° and 180°.

Accepted Answer

A) True 
 B)False

Question 11

An inductance in series with an external resistance used to prevent the ac signal voltage from developing any appreciable output across the resistance at the frequency of the source is called a(n)

Accepted Answer

A)  coil 
B)  inductor 
C)  condenser 
D)  choke 
A)  coil 
B)  inductor 
C)  condenser 
D)  choke

Question 12

In order to ______________ effective resistance for small rf coils, a litz wire should be used.

Accepted Answer

The answer of In order to ______________ effective resistance for...

Question 13

Using litz wire or stranded wire made with separate strands insulated from each other and braided can reduce

Accepted Answer

A)  Re for small rf coils 
B)  XL for small rf coils 
C)  L for small rf coils 
D)  Z for small rf coils 
A)  Re for small rf coils 
B)  XL for small rf coils 
C)  L for small rf coils 
D)  Z for small rf coils

Question 14

When radio-frequency current tends to flow at the surface of a conductor at very high frequencies, with little current in the solid core at the center is referred to as

Accepted Answer

A)  coax current 
B)  eddy current 
C)  rf effect 
D)  skin effect 
A)  coax current 
B)  eddy current 
C)  rf effect 
D)  skin effect

Question 15

When a coil has series resistance, alternating current is limited by only R.

Accepted Answer

A) True 
 B)False

Question 16

For a series RL circuit, when R is equal to or 10 times greater than XL

Accepted Answer

A)  ZT is approximately equal to zero ohms 
B)  ZT is approximately equal to infinite ohms 
C)  ZT is approximately equal to R 
D)  ZT is approximately equal to XL 
A)  ZT is approximately equal to zero ohms 
B)  ZT is approximately equal to infinite ohms 
C)  ZT is approximately equal to R 
D)  ZT is approximately equal to XL

Question 17

Inductance has the useful characteristic of providing more ohms of reactance at

Accepted Answer

A)  lower frequencies 
B)  higher frequencies 
C)  resonant frequencies 
D)  harmonic frequencies 
A)  lower frequencies 
B)  higher frequencies 
C)  resonant frequencies 
D)  harmonic frequencies

Question 18

In a series circuit, the higher the value of XL compared with R, the more inductive the circuit.

Accepted Answer

A) True 
 B)False

Question 19

The quality Q of a capacitor in terms of minimum loss is often indicated by its

Accepted Answer

A)  capacitance 
B)  reactance 
C)  power factor 
D)  dielectric 
A)  capacitance 
B)  reactance 
C)  power factor 
D)  dielectric

Question 20

What is the phase angle for the voltage across XL with respect to the current through L?

Accepted Answer

A)  VL lags IL by 90° 
B)  VL leads IL by 90° 
C)  VL leads IL by 45° 
D)  VL is in phase with IL 
A)  VL lags IL by 90° 
B)  VL leads IL by 90° 
C)  VL leads IL by 45° 
D)  VL is in phase with IL

Exam 22: Inductive Circuits

For any inductor, the induced voltage remains constant if

When series voltage drops that are out of phase are combined, they cannot be added without taking the phase difference into account.

How much is ZT for a 100 ? R in series with a 100 ? inductor?

In a series RL circuit, the voltage drops VR and VL are

A trigonometric function of any angle of a right triangle, equal to the ratio of the opposite side to the adjacent side of a triangle is the

In phasor triangles for volts and ohms in a series circuit, the phasor for R, IR, or VR is used as a reference at 0°.

A ______________ is an inductance in series with an external R to prevent the ac signal voltage from developing any appreciable output across R at the frequency of the source.

For any inductor, the induced voltage remains ______________ if the rate of current change is constant.

Typically, the lower the internal resistance of a coil, the ______________ its Q.

A cosine wave has its maximum values at 90° and 270° and its minimum values at 0° and 180°.

An inductance in series with an external resistance used to prevent the ac signal voltage from developing any appreciable output across the resistance at the frequency of the source is called a(n)

In order to ______________ effective resistance for small rf coils, a litz wire should be used.

Using litz wire or stranded wire made with separate strands insulated from each other and braided can reduce

When radio-frequency current tends to flow at the surface of a conductor at very high frequencies, with little current in the solid core at the center is referred to as

When a coil has series resistance, alternating current is limited by only R.

For a series RL circuit, when R is equal to or 10 times greater than XL

Inductance has the useful characteristic of providing more ohms of reactance at

In a series circuit, the higher the value of XL compared with R, the more inductive the circuit.

The quality Q of a capacitor in terms of minimum loss is often indicated by its

What is the phase angle for the voltage across XL with respect to the current through L?

Introduction

Electricity

Resistors

Ohms Law

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Voltage Dividers and Current Dividers

Analog and Digital Multimeters

Kirchhoff S Laws

Network Theorems

Conductors and Insulators

Batteries

Magnetism

Electromagnetism

Alternating Voltage and Current

Capacitance

Capacitive Reactance

Capacitive Circuits

Inductance

Inductive Reactance

RC and LR Time Constants

Alternating Current Circuits

Complex Numbers for Ac Circuits

Resonance

Filters

Three-Phase Ac Power Systems

Diodes and Diode Applications

Bipolar Junction Transistors

Transistor Amplifiers

Field Effect Transistors

Power Amplifiers

Thyristors

Operational Amplifiers

Filters

How much is Z_T for a 100 ? R in series with a 100 ? inductor?

In a series RL circuit, the voltage drops V_R and V_L are

In phasor triangles for volts and ohms in a series circuit, the phasor for R, IR, or V_R is used as a reference at 0°.

For a series RL circuit, when R is equal to or 10 times greater than X_L

In a series circuit, the higher the value of X_L compared with R, the more inductive the circuit.

What is the phase angle for the voltage across X_L with respect to the current through L?