Question 1

True power for an inductor is measured in VAR rather than Watts.

Accepted Answer

A) True 
 B)False  False

Question 2

The voltage leads the current in an inductive circuit.

Accepted Answer

A) True 
 B)False  True

Question 3

Inductors in series or parallel combine just like resistors in series or parallel.

Accepted Answer

A) True 
 B)False  True

Question 4

The quality factor of a coil or inductor is calculated by:

Accepted Answer

A)  $\mathrm { QL } = 2 \pi \mathrm { fL }$ 
B)  $\mathrm { QL } = \frac { 1 } { 2 \pi \mathrm { fL } }$ 
C)  $\mathrm { QL } = \frac { \mathrm { L } } { \mathrm { R } }$ 
D)  $\mathrm { QL } = 2 \pi \mathrm { fL } / \mathrm { RW }$ 
A)  $\mathrm { QL } = 2 \pi \mathrm { fL }$ 
B)  $\mathrm { QL } = \frac { 1 } { 2 \pi \mathrm { fL } }$ 
C)  $\mathrm { QL } = \frac { \mathrm { L } } { \mathrm { R } }$ 
D)  $\mathrm { QL } = 2 \pi \mathrm { fL } / \mathrm { RW }$

Question 5

An inductor is placed in series With the load for power supply filtration.

Accepted Answer

A) True 
 B)False

Question 6

The time constant for an inductor for each time period:

Accepted Answer

A)  corresponds to a 37% of the decrease in value. 
B)  is a constant value. 
C)  corresponds to a 63% of the increase in value. 
D)  all of these. 
A)  corresponds to a 37% of the decrease in value. 
B)  is a constant value. 
C)  corresponds to a 63% of the increase in value. 
D)  all of these.

Question 7

An  0.05  $\mu \mathrm { H }$ inductance is larger than a_________

Accepted Answer

A)   0.000000008 H  inductance 
B)   0.0000005 H inductance 
C)   0.000005 H  inductance 
D)   0.00005 H  inductance 
A)   0.000000008 H  inductance 
B)   0.0000005 H inductance 
C)   0.000005 H  inductance 
D)   0.00005 H  inductance

Question 8

In an inductive circuit, the ________ lags the ________.

Accepted Answer

A) voltage, resistance 
B) voltage, reactance 
C) current,Voltage 
D) current, resistance 
A) voltage, resistance 
B) voltage, reactance 
C) current,Voltage 
D) current, resistance

Question 9

The voltage and current are in phase in an inductive circuit.

Accepted Answer

A) True 
 B)False

Question 10

What is the reactance of a 100 $\mu \mathrm { H }$ inductor operating at  100 kHz  ?

Accepted Answer

A)   6.28 $\Omega$ 
B)   62.8 $\Omega$ 
C)   62.8  $\mathrm { k } \Omega$ 
D)  infinite $\Omega$ 
A)   6.28 $\Omega$ 
B)   62.8 $\Omega$ 
C)   62.8  $\mathrm { k } \Omega$ 
D)  infinite $\Omega$

Question 11

An inductor passes direct current and opposes alternating current.

Accepted Answer

A) True 
 B)False

Question 12

If a 15 $\mu \mathrm { H }$ inductor has a  2.2  $\mathrm { k } \Omega$
 reactance, the frequency equals________

Accepted Answer

A)   4.28 kHz 
B)   23.3 kHz 
C)   4.28 MHz 
D)   23.3 MHz 
A)   4.28 kHz 
B)   23.3 kHz 
C)   4.28 MHz 
D)   23.3 MHz

Question 13

The ripple voltage as measured at the output of a power supply has increased.W hich of the following could be the problem?

Accepted Answer

A) partial shorting of the Windings of the filtering coil 
B) load resistance has dropped 
C) resistance of the coil has decreased 
D) either A or B 
A) partial shorting of the Windings of the filtering coil 
B) load resistance has dropped 
C) resistance of the coil has decreased 
D) either A or B

Question 14

A 0.33 mH inductance is smaller than a ________.

Accepted Answer

A) 0.05 mH inductance 
B) 33 pH inductance 
C) 0.0005 H inductance 
D) 330 pH inductance 
A) 0.05 mH inductance 
B) 33 pH inductance 
C) 0.0005 H inductance 
D) 330 pH inductance

Question 15

The total inductance of two parallel inductors equals the sum of their inductance values.

Accepted Answer

A) True 
 B)False

Question 16

If an inductor, resistor and switch are connected in series to a 12 V battery,W hat is the magnitude of the inductorʹs voltage at the instant that the switch is closed?

Accepted Answer

A) 6V 
B) 4V 
C) 0V 
D) 12V 
A) 6V 
B) 4V 
C) 0V 
D) 12V

Question 17

Inductive reactance decreases as frequency increases.

Accepted Answer

A) True 
 B)False

Question 18

Reactive power (Pr)  in an inductor is defined as the rate at which an inductor stores or returns energy and is measured in:

Accepted Answer

A)  current per time constant. 
B)  volt-ampere reactive. 
C)  volts per time constant. 
D)  watts reactive. 
A)  current per time constant. 
B)  volt-ampere reactive. 
C)  volts per time constant. 
D)  watts reactive.

Question 19

The most commonplace use for inductors in electronics:

Accepted Answer

A) passes ACVoltages. 
B) blocks DCVoltages. 
C) passes DCVoltages. 
D) blocks ACVoltages. 
A) passes ACVoltages. 
B) blocks DCVoltages. 
C) passes DCVoltages. 
D) blocks ACVoltages.

Question 20

What is the maximum current in a  12 mH inductor if it is connected in series with a 10 $k \Omega$ resistor and a  15 VDC source?

Accepted Answer

A)   6.32 mA 
B)   1.5 mA 
C)   1.2 mA 
D)   2.2 mA 
A)   6.32 mA 
B)   1.5 mA 
C)   1.2 mA 
D)   2.2 mA

True power for an inductor is measured in VAR rather than Watts.

The voltage leads the current in an inductive circuit.

Inductors in series or parallel combine just like resistors in series or parallel.

The quality factor of a coil or inductor is calculated by:

An inductor is placed in series With the load for power supply filtration.

The time constant for an inductor for each time period:

An 0.05 $\mu \mathrm { H }$ inductance is larger than a_________

In an inductive circuit, the lags the .

The voltage and current are in phase in an inductive circuit.

What is the reactance of a 100 $\mu \mathrm { H }$ inductor operating at 100 kHz ?

An inductor passes direct current and opposes alternating current.

If a 15 $\mu \mathrm { H }$ inductor has a 2.2 $\mathrm { k } \Omega$ reactance, the frequency equals________

The ripple voltage as measured at the output of a power supply has increased.W hich of the following could be the problem?

A 0.33 mH inductance is smaller than a ________.

The total inductance of two parallel inductors equals the sum of their inductance values.

If an inductor, resistor and switch are connected in series to a 12 V battery,W hat is the magnitude of the inductorʹs voltage at the instant that the switch is closed?

Inductive reactance decreases as frequency increases.

Reactive power (Pr) in an inductor is defined as the rate at which an inductor stores or returns energy and is measured in:

The most commonplace use for inductors in electronics:

What is the maximum current in a 12 mH inductor if it is connected in series with a 10 $k \Omega$ resistor and a 15 V_DC source?

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

True power for an inductor is measured in VAR rather than Watts.

The voltage leads the current in an inductive circuit.

Inductors in series or parallel combine just like resistors in series or parallel.

The quality factor of a coil or inductor is calculated by:

An inductor is placed in series With the load for power supply filtration.

The time constant for an inductor for each time period:

An 0.05 μH\mu \mathrm { H }μH inductance is larger than a_________

In an inductive circuit, the ________ lags the ________.

The voltage and current are in phase in an inductive circuit.

What is the reactance of a 100 μH\mu \mathrm { H }μH inductor operating at 100 kHz ?

An inductor passes direct current and opposes alternating current.

If a 15 μH\mu \mathrm { H }μH inductor has a 2.2 kΩ\mathrm { k } \OmegakΩ reactance, the frequency equals________

The ripple voltage as measured at the output of a power supply has increased.W hich of the following could be the problem?

A 0.33 mH inductance is smaller than a ________.

The total inductance of two parallel inductors equals the sum of their inductance values.

If an inductor, resistor and switch are connected in series to a 12 V battery,W hat is the magnitude of the inductorʹs voltage at the instant that the switch is closed?

Inductive reactance decreases as frequency increases.

Reactive power (Pr) in an inductor is defined as the rate at which an inductor stores or returns energy and is measured in:

The most commonplace use for inductors in electronics:

What is the maximum current in a 12 mH inductor if it is connected in series with a 10 kΩk \OmegakΩ resistor and a 15 VDC source?

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

An 0.05 $\mu \mathrm { H }$ inductance is larger than a_________

In an inductive circuit, the lags the .

What is the reactance of a 100 $\mu \mathrm { H }$ inductor operating at 100 kHz ?

If a 15 $\mu \mathrm { H }$ inductor has a 2.2 $\mathrm { k } \Omega$ reactance, the frequency equals________

What is the maximum current in a 12 mH inductor if it is connected in series with a 10 $k \Omega$ resistor and a 15 V_DC source?