Question 1

When inductors are connected in parallel, their total inductance acts like:

Accepted Answer

A) resistance connected in parallel. 
B) resistance connected in series-parallel. 
C) resistance connected in series. 
D) all of these. 
A) resistance connected in parallel. 
B) resistance connected in series-parallel. 
C) resistance connected in series. 
D) all of these.

Question 2

What is the total inductance of four  10 mH  inductors connected in series?

Accepted Answer

A)   2.5 mH 
B)  40,000 $\mu \mathrm { H }$ 
C)   40 mH 
D)   250 mH 
A)   2.5 mH 
B)  40,000 $\mu \mathrm { H }$ 
C)   40 mH 
D)   250 mH

Question 3

If an inductor carries  150 mADC  of current when connected across a  65 VDC source, what is its resistance?

Accepted Answer

A)   26.7 $\Omega$ 
B)   433$\Omega$ 
C)   30 $\Omega$ 
D)   65 $\Omega$ 
A)   26.7 $\Omega$ 
B)   433$\Omega$ 
C)   30 $\Omega$ 
D)   65 $\Omega$

Question 4

If a  27 mH  inductor has a reactance of  5.5 $k \Omega$ , the frequency equals_____

Accepted Answer

A)   3.24 kHz 
B)   32.4 kHz 
C)   932 Hz 
D)   324 Hz 
A)   3.24 kHz 
B)   32.4 kHz 
C)   932 Hz 
D)   324 Hz

Question 5

The energy stored in an inductorʹs electromagnetic field is produced by the resistance of the inductorʹs Winding.

Accepted Answer

A) True 
 B)False

Question 6

In an inductive AC circuit, the phase relationship between the voltage and the current is such that the:

Accepted Answer

A) voltage is lagging the current. 
B) current is 180 degrees out of phase with Voltage. 
C) current is lagging the Voltage. 
D) voltage is 360 degrees out of phase with Voltage. 
A) voltage is lagging the current. 
B) current is 180 degrees out of phase with Voltage. 
C) current is lagging the Voltage. 
D) voltage is 360 degrees out of phase with Voltage.

Question 7

What is the inductance of a 20 mH inductor connected in parallel With a 50 mH inductor?

Accepted Answer

A) 14.3 mH 
B) 70 mH 
C) 50 mH 
D) 20 mH 
A) 14.3 mH 
B) 70 mH 
C) 50 mH 
D) 20 mH

Question 8

Stray capacitance for a coil becomes a problem:

Accepted Answer

A) with high frequencies. 
B) at resonant frequencies. 
C) with ac circuits. 
D) with low frequencies. 
A) with high frequencies. 
B) at resonant frequencies. 
C) with ac circuits. 
D) with low frequencies.

Question 9

$$\text { Figure } \mathbf { 1 1 } \triangleleft \mathbf { 1 }$$
-How much current flows in the circuit in Figure 11-1 if connected to a 12 VPP, 2 kHz source?

Accepted Answer

A) 4.77 mAp-p 
B) 10.1 mAp-p 
C) 60.5 mAp-p 
D) 126 mAp-p 
A) 4.77 mAp-p 
B) 10.1 mAp-p 
C) 60.5 mAp-p 
D) 126 mAp-p

Question 10

How many time constants Will it take to completely build a magnetic field around an inductor?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 11

What is the total inductance of a  14 mH, 22 mH  and  45 mH inductor connected in series?

Accepted Answer

A)   7.2 mH 
B)   81 mH 
C)   20 mH 
D)  81 $\mu \mathrm { H }$ 
A)   7.2 mH 
B)   81 mH 
C)   20 mH 
D)  81 $\mu \mathrm { H }$

Question 12

How many time constants Will it take to completely collapse an inductorʹs magnetic field?

Accepted Answer

A) 3 
B) 4 
C) 1 
D) 5 
A) 3 
B) 4 
C) 1 
D) 5

Question 13

If a  1 mH, 3.3 mH, and  0.1 mH inductor are connected in parallel,  LT  equals_______

Accepted Answer

A)  less than  0.1 mH 
B)   4.4 mH 
C)   5.3 mH 
D)  greater than  3.3 mH 
A)  less than  0.1 mH 
B)   4.4 mH 
C)   5.3 mH 
D)  greater than  3.3 mH

Question 14

What is one time constant for a  10 mH inductor connected in series with a 47 $\mathrm { k } \Omega$ resistor?

Accepted Answer

A)   0.213  $\mu S$ 
B)   470 mS 
C)  213 $\mu S$ 
D)   470 S 
A)   0.213  $\mu S$ 
B)   470 mS 
C)  213 $\mu S$ 
D)   470 S

Question 15

The quality factor for an inductor becomes more apparent at higher frequencies.

Accepted Answer

A) True 
 B)False

Question 16

If two  2.5 mH  inductors are connected in series with a  4.7 $\mathrm { k } \Omega$  resistor and the source voltage is 100 VDC what is the circuit's maximum current?

Accepted Answer

A)   7.9 mA 
B)   21.3 mA 
C)   63.2 mA 
D)   1.1 mA 
A)   7.9 mA 
B)   21.3 mA 
C)   63.2 mA 
D)   1.1 mA

Question 17

What is the total inductance of a 25 mH inductor connected in parallel With a 100 mH inductor?

Accepted Answer

A) 20 mH 
B) 125 mH 
C) less than 20 mH 
D) more than 125 mH 
A) 20 mH 
B) 125 mH 
C) less than 20 mH 
D) more than 125 mH

Question 18

The time constant of an inductor is:

Accepted Answer

A) inversely proportional to the resistance in the circuit. 
B) the time required forVoltage or current to increase to 63% or to decrease to 37%. 
C) directly proportional to the inductance in the circuit. 
D) all of these. 
A) inversely proportional to the resistance in the circuit. 
B) the time required forVoltage or current to increase to 63% or to decrease to 37%. 
C) directly proportional to the inductance in the circuit. 
D) all of these.

Question 19

Connecting a ________ inductor in ________With a 100 m H inductor produces a 65 m H inductance.

Accepted Answer

A) 35 mH, parallel 
B) 186 mH, series 
C) 35 mH, series 
D) 186 mH, parallel 
A) 35 mH, parallel 
B) 186 mH, series 
C) 35 mH, series 
D) 186 mH, parallel

Question 20

Connecting a ______inductor in ____with a  70 mH inductor produces a  100 mH inductance.

Accepted Answer

A)   30 mH , parallel 
B)   233 mH , series 
C)   233 mH , parallel 
D)   30 mH , series 
A)   30 mH , parallel 
B)   233 mH , series 
C)   233 mH , parallel 
D)   30 mH , series

When inductors are connected in parallel, their total inductance acts like:

What is the total inductance of four 10 mH inductors connected in series?

If an inductor carries 150 mA_DC of current when connected across a 65 V_DC source, what is its resistance?

If a 27 mH inductor has a reactance of 5.5 $k \Omega$ , the frequency equals_____

The energy stored in an inductorʹs electromagnetic field is produced by the resistance of the inductorʹs Winding.

In an inductive AC circuit, the phase relationship between the voltage and the current is such that the:

What is the inductance of a 20 mH inductor connected in parallel With a 50 mH inductor?

Stray capacitance for a coil becomes a problem:

How many time constants Will it take to completely build a magnetic field around an inductor?

What is the total inductance of a 14 mH, 22 mH and 45 mH inductor connected in series?

How many time constants Will it take to completely collapse an inductorʹs magnetic field?

If a 1 mH, 3.3 mH, and 0.1 mH inductor are connected in parallel, L_T equals_______

What is one time constant for a 10 mH inductor connected in series with a 47 $\mathrm { k } \Omega$ resistor?

The quality factor for an inductor becomes more apparent at higher frequencies.

If two 2.5 mH inductors are connected in series with a 4.7 $\mathrm { k } \Omega$ resistor and the source voltage is 100 VDC what is the circuit's maximum current?

What is the total inductance of a 25 mH inductor connected in parallel With a 100 mH inductor?

The time constant of an inductor is:

Connecting a inductor in With a 100 m H inductor produces a 65 m H inductance.

Connecting a __inductor in with a 70 mH inductor produces a 100 mH inductance.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Regulators, Filters, and Op-Amps

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

Exam 11: Inductors

When inductors are connected in parallel, their total inductance acts like:

What is the total inductance of four 10 mH inductors connected in series?

If an inductor carries 150 mADC of current when connected across a 65 VDC source, what is its resistance?

If a 27 mH inductor has a reactance of 5.5 kΩk \OmegakΩ , the frequency equals_____

The energy stored in an inductorʹs electromagnetic field is produced by the resistance of the inductorʹs Winding.

In an inductive AC circuit, the phase relationship between the voltage and the current is such that the:

What is the inductance of a 20 mH inductor connected in parallel With a 50 mH inductor?

Stray capacitance for a coil becomes a problem:

Figure 11◃1\text { Figure } \mathbf { 1 1 } \triangleleft \mathbf { 1 } Figure 11◃1 -How much current flows in the circuit in Figure 11-1 if connected to a 12 VPP, 2 kHz source?

How many time constants Will it take to completely build a magnetic field around an inductor?

What is the total inductance of a 14 mH, 22 mH and 45 mH inductor connected in series?

How many time constants Will it take to completely collapse an inductorʹs magnetic field?

If a 1 mH, 3.3 mH, and 0.1 mH inductor are connected in parallel, LT equals_______

What is one time constant for a 10 mH inductor connected in series with a 47 kΩ\mathrm { k } \OmegakΩ resistor?

The quality factor for an inductor becomes more apparent at higher frequencies.

If two 2.5 mH inductors are connected in series with a 4.7 kΩ\mathrm { k } \OmegakΩ resistor and the source voltage is 100 VDC what is the circuit's maximum current?

What is the total inductance of a 25 mH inductor connected in parallel With a 100 mH inductor?

The time constant of an inductor is:

Connecting a ________ inductor in ________With a 100 m H inductor produces a 65 m H inductance.

Connecting a ______inductor in ____with a 70 mH inductor produces a 100 mH inductance.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Regulators, Filters, and Op-Amps

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

If an inductor carries 150 mA_DC of current when connected across a 65 V_DC source, what is its resistance?

If a 27 mH inductor has a reactance of 5.5 $k \Omega$ , the frequency equals_____

If a 1 mH, 3.3 mH, and 0.1 mH inductor are connected in parallel, L_T equals_______

What is one time constant for a 10 mH inductor connected in series with a 47 $\mathrm { k } \Omega$ resistor?

If two 2.5 mH inductors are connected in series with a 4.7 $\mathrm { k } \Omega$ resistor and the source voltage is 100 VDC what is the circuit's maximum current?

Connecting a inductor in With a 100 m H inductor produces a 65 m H inductance.

Connecting a __inductor in with a 70 mH inductor produces a 100 mH inductance.