Question 1

Electrolytic capacitors must be connected into a circuit such that:

Accepted Answer

A) reversal of polarity does not happen. 
B) positive lead to positiveVoltage; negative lead to negative Voltage. 
C) voltage rating marked is not exceeded. 
D) all of these. 
A) reversal of polarity does not happen. 
B) positive lead to positiveVoltage; negative lead to negative Voltage. 
C) voltage rating marked is not exceeded. 
D) all of these. D

Question 2

A common use for electrolytic capacitors found in power supplies is ________.

Accepted Answer

A) decoupling 
B) filtering 
C) passing AC 
D) blocking DC 
A) decoupling 
B) filtering 
C) passing AC 
D) blocking DC B

Question 3

How long will it take for a 22 $\mu \mathrm { F }$ capacitor to completely charge through a 47 $\mathrm { k } \Omega$ resistor?

Accepted Answer

A)   5.17 s 
B)   8.272 s 
C)   1.034 s 
D)   2.068 s 
A)   5.17 s 
B)   8.272 s 
C)   1.034 s 
D)   2.068 s A

Question 4

How long will it take for a 22 $\mu \mathrm { F }$ capacitor to completely discharge through a  4.7  $\mathrm { k } \Omega$ resistor?

Accepted Answer

A)   0.103 s 
B)   0.827  s 
C)   0.517  s 
D)   0.207  s 
A)   0.103 s 
B)   0.827  s 
C)   0.517  s 
D)   0.207  s

Question 5

How much charge is stored in a  0.022  $\mu \mathrm { F }$ capacitor that drops 22 V?

Accepted Answer

A)   4.84  $\mu \mathrm { C }$ 
B)   0.484  $\mu \mathrm { C }$ 
C)   48.4  $\mu \mathrm { C }$ 
D)   0.0484  $\mu \mathrm { C }$ 
A)   4.84  $\mu \mathrm { C }$ 
B)   0.484  $\mu \mathrm { C }$ 
C)   48.4  $\mu \mathrm { C }$ 
D)   0.0484  $\mu \mathrm { C }$

Question 6

When capacitors are connected in parallel, their total capacitance act 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 7

At what frequency is a  0.001  $\mu \mathrm { F }$ capacitor operating if its reactance is 45 $\mathrm { k } \Omega$ ?

Accepted Answer

A)   3.54 MHz 
B)   3.54 kHz 
C)   354 kHz 
D)   35.4 kHz 
A)   3.54 MHz 
B)   3.54 kHz 
C)   354 kHz 
D)   35.4 kHz

Question 8

The voltage rating of a capacitor indicates the voltage itW ill charge up to.

Accepted Answer

A) True 
 B)False

Question 9

What is the small amount of power lost in a capacitive circuit due to the internal resistance of the capacitors?

Accepted Answer

A) instantaneous power 
B) ideal power 
C) reactive power 
D) true power 
A) instantaneous power 
B) ideal power 
C) reactive power 
D) true power

Question 10

If the plate area of a capacitor decreases, the capacitance decreases.

Accepted Answer

A) True 
 B)False

Question 11

Reactive power (Pr)in a capacitor is defined as the rate atW hich a capacitor stores or returns energy and is measured in:

Accepted Answer

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

Question 12

If the dc Working voltage of a capacitor is 100 V, the dielectric must With stand ________.

Accepted Answer

A) 85V 
B) 75V 
C) 100V 
D) 220V 
A) 85V 
B) 75V 
C) 100V 
D) 220V

Question 13

Efficient filtering is directly related to RC time constant.

Accepted Answer

A) True 
 B)False

Question 14

If a  4.7 $\mu \mathrm { F }$ capacitor and a 10 $\mathrm { k } \Omega$ resistor are connected in series across 25 $\mathrm { V_{DC }}$ , approximately how much voltage will the resistor drop after charging for just one time constant?

Accepted Answer

A)   23.8 V 
B)   21.6 V 
C)   15.8 V 
D)   9.20 V 
A)   23.8 V 
B)   21.6 V 
C)   15.8 V 
D)   9.20 V

Question 15

At what frequency is a  2000 $p \mathrm {~F}$ capacitor operating if its reactance is  745 $\Omega$ ?

Accepted Answer

A)   107 kHz 
B)   1.01 kHz 
C)   10.1 kHz 
D)   1010 Hz 
A)   107 kHz 
B)   1.01 kHz 
C)   10.1 kHz 
D)   1010 Hz

Question 16

What is the capacitance that stores  1.175  $\mu \mathrm { C }$ of charge and drops 25 V?

Accepted Answer

A)   0.47 $\mu F$ 
B)   0.047  $\mu \mathrm { F }$ 
C)   4.7  $\mu \mathrm { F }$ 
D)  47 $\mu \mathrm { F }$ 
A)   0.47 $\mu F$ 
B)   0.047  $\mu \mathrm { F }$ 
C)   4.7  $\mu \mathrm { F }$ 
D)  47 $\mu \mathrm { F }$

Question 17

Capacitance is a capacitor?s ability to store resistance.

Accepted Answer

A) True 
 B)False

Question 18

The time constant of a capacitor is:

Accepted Answer

A) the time required to charge to 63% or discharge to 37%. 
B) directly proportional to the resistance in the circuit. 
C) directly proportional to the capacitance in the circuit. 
D) all of these. 
A) the time required to charge to 63% or discharge to 37%. 
B) directly proportional to the resistance in the circuit. 
C) directly proportional to the capacitance in the circuit. 
D) all of these.

Question 19

How long will it take a  0.047  $\mu \mathrm { F }$ capacitor to fully charge through a 100 $\mathrm { k } \Omega$ resistor?

Accepted Answer

A)   235  ms 
B)   2.35  s 
C)   0.235  ms 
D)   23.5  ms 
A)   235  ms 
B)   2.35  s 
C)   0.235  ms 
D)   23.5  ms

Question 20

If the distance between the plates of a capacitor increases, the capacitance decreases.

Accepted Answer

A) True 
 B)False

Electrolytic capacitors must be connected into a circuit such that:

A common use for electrolytic capacitors found in power supplies is ________.

How long will it take for a 22 $\mu \mathrm { F }$ capacitor to completely charge through a 47 $\mathrm { k } \Omega$ resistor?

How long will it take for a 22 $\mu \mathrm { F }$ capacitor to completely discharge through a 4.7 $\mathrm { k } \Omega$ resistor?

How much charge is stored in a 0.022 $\mu \mathrm { F }$ capacitor that drops 22 V?

When capacitors are connected in parallel, their total capacitance act like:

At what frequency is a 0.001 $\mu \mathrm { F }$ capacitor operating if its reactance is 45 $\mathrm { k } \Omega$ ?

The voltage rating of a capacitor indicates the voltage itW ill charge up to.

What is the small amount of power lost in a capacitive circuit due to the internal resistance of the capacitors?

If the plate area of a capacitor decreases, the capacitance decreases.

Reactive power (Pr)in a capacitor is defined as the rate atW hich a capacitor stores or returns energy and is measured in:

If the dc Working voltage of a capacitor is 100 V, the dielectric must With stand ________.

Efficient filtering is directly related to RC time constant.

If a 4.7 $\mu \mathrm { F }$ capacitor and a 10 $\mathrm { k } \Omega$ resistor are connected in series across 25 $\mathrm { V_{DC }}$ , approximately how much voltage will the resistor drop after charging for just one time constant?

At what frequency is a 2000 $p \mathrm {~F}$ capacitor operating if its reactance is 745 $\Omega$ ?

What is the capacitance that stores 1.175 $\mu \mathrm { C }$ of charge and drops 25 V?

Capacitance is a capacitor?s ability to store resistance.

The time constant of a capacitor is:

How long will it take a 0.047 $\mu \mathrm { F }$ capacitor to fully charge through a 100 $\mathrm { k } \Omega$ resistor?

If the distance between the plates of a capacitor increases, the capacitance decreases.

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

Rc Circuits

Inductors

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 9: Capacitors

Electrolytic capacitors must be connected into a circuit such that:

A common use for electrolytic capacitors found in power supplies is ________.

How long will it take for a 22 μF\mu \mathrm { F }μF capacitor to completely charge through a 47 kΩ\mathrm { k } \OmegakΩ resistor?

How long will it take for a 22 μF\mu \mathrm { F }μF capacitor to completely discharge through a 4.7 kΩ\mathrm { k } \OmegakΩ resistor?

How much charge is stored in a 0.022 μF\mu \mathrm { F }μF capacitor that drops 22 V?

When capacitors are connected in parallel, their total capacitance act like:

At what frequency is a 0.001 μF\mu \mathrm { F }μF capacitor operating if its reactance is 45 kΩ\mathrm { k } \OmegakΩ ?

The voltage rating of a capacitor indicates the voltage itW ill charge up to.

What is the small amount of power lost in a capacitive circuit due to the internal resistance of the capacitors?

If the plate area of a capacitor decreases, the capacitance decreases.

Reactive power (Pr)in a capacitor is defined as the rate atW hich a capacitor stores or returns energy and is measured in:

If the dc Working voltage of a capacitor is 100 V, the dielectric must With stand ________.

Efficient filtering is directly related to RC time constant.

If a 4.7 μF\mu \mathrm { F }μF capacitor and a 10 kΩ\mathrm { k } \OmegakΩ resistor are connected in series across 25 VDC\mathrm { V_{DC }}VDC​ , approximately how much voltage will the resistor drop after charging for just one time constant?

At what frequency is a 2000 p Fp \mathrm {~F}p F capacitor operating if its reactance is 745 Ω\OmegaΩ ?

What is the capacitance that stores 1.175 μC\mu \mathrm { C }μC of charge and drops 25 V?

Capacitance is a capacitor?s ability to store resistance.

The time constant of a capacitor is:

How long will it take a 0.047 μF\mu \mathrm { F }μF capacitor to fully charge through a 100 kΩ\mathrm { k } \OmegakΩ resistor?

If the distance between the plates of a capacitor increases, the capacitance decreases.

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

Rc Circuits

Inductors

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

How long will it take for a 22 $\mu \mathrm { F }$ capacitor to completely charge through a 47 $\mathrm { k } \Omega$ resistor?

How long will it take for a 22 $\mu \mathrm { F }$ capacitor to completely discharge through a 4.7 $\mathrm { k } \Omega$ resistor?

How much charge is stored in a 0.022 $\mu \mathrm { F }$ capacitor that drops 22 V?

At what frequency is a 0.001 $\mu \mathrm { F }$ capacitor operating if its reactance is 45 $\mathrm { k } \Omega$ ?

If a 4.7 $\mu \mathrm { F }$ capacitor and a 10 $\mathrm { k } \Omega$ resistor are connected in series across 25 $\mathrm { V_{DC }}$ , approximately how much voltage will the resistor drop after charging for just one time constant?

At what frequency is a 2000 $p \mathrm {~F}$ capacitor operating if its reactance is 745 $\Omega$ ?

What is the capacitance that stores 1.175 $\mu \mathrm { C }$ of charge and drops 25 V?

How long will it take a 0.047 $\mu \mathrm { F }$ capacitor to fully charge through a 100 $\mathrm { k } \Omega$ resistor?