Question 1

Electrolytic capacitors are ideal for alternating current applications.

Accepted Answer

A) True 
 B)False

Question 2

If an uncharged capacitor, a resistor, a switch and a 12 V battery are connected in series, what is the voltage across the capacitor at the instant the switch is closed?

Accepted Answer

A) 24 V 
B) 0 V 
C) 6 V 
D) 12 V 
A) 24 V 
B) 0 V 
C) 6 V 
D) 12 V

Question 3

How much voltage is dropped across a   capacitor after 3.33 seconds if it is charged by a 50 V source through a   resistor?

Accepted Answer

A) 49 V 
B) 31.8 V 
C) 43.3 V 
D) 47.5 V 
A) 49 V 
B) 31.8 V 
C) 43.3 V 
D) 47.5 V

Question 4

With three capacitors in series, the current lags the voltage by:

Accepted Answer

A) 30 degrees. 
B) 90 degrees. 
C) 45 degrees. 
D) none of the above. 
A) 30 degrees. 
B) 90 degrees. 
C) 45 degrees. 
D) none of the above.

Question 5

Capacitance is a capacitorʹs ability to store resistance.

Accepted Answer

A) True 
 B)False

Question 6

The removal of high frequency transient voltages with a capacitor is called:

Accepted Answer

A) ac blocking. 
B) decoupling. 
C) coupling. 
D) bypassing. 
A) ac blocking. 
B) decoupling. 
C) coupling. 
D) bypassing.

Question 7

A capacitor will fully charge in about five time constants.

Accepted Answer

A) True 
 B)False

Question 8

-What is   in Figure?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 9

What is one time constant of a   capacitor in series with a   resistor?

Accepted Answer

A) 5.64 s 
B) 0.564 ms 
C) 54.6 s 
D) 564 ms 
A) 5.64 s 
B) 0.564 ms 
C) 54.6 s 
D) 564 ms

Question 10

Electrolytic capacitors must be connected into a circuit such that:

Accepted Answer

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

Question 11

What is the capacitance that stores   of charge and drops 25 V?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 12

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 13

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

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

If an uncharged capacitor, a resistor, a switch and a 12 V battery are connected in series, what is the voltage across the capacitor after it is fully charged?

Accepted Answer

A) 12 V 
B) -6 V 
C) 6 V 
D) 24 V 
A) 12 V 
B) -6 V 
C) 6 V 
D) 24 V

Question 16

How long will it take for a   capacitor to completely discharge through a   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 17

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 18

A commonplace use for capacitors in electronics is to:

Accepted Answer

A) block AC voltages. 
B) pass DC voltages only. 
C) pass both AC and DC voltages. 
D) block DC voltages. 
A) block AC voltages. 
B) pass DC voltages only. 
C) pass both AC and DC voltages. 
D) block DC voltages.

Question 19

If a   capacitor and a   resistor are connected in series across 30   , how much voltage will the capacitor drop after charging for just one time constant?

Accepted Answer

A) 25.9 V 
B) 19.0 V 
C) 29.4 V 
D) 28.5 V 
A) 25.9 V 
B) 19.0 V 
C) 29.4 V 
D) 28.5 V

Question 20

Upon checking the voltage output of a power supply with an oscilloscope, you notice an unusually large amount of ripple. What could possibly be the problem?

Accepted Answer

A) shorted filter capacitor 
B) shorted load 
C) open filter capacitor 
D) either B or C 
A) shorted filter capacitor 
B) shorted load 
C) open filter capacitor 
D) either B or C

Exam 9: Branch, Loop, and Node Analyses

Electrolytic capacitors are ideal for alternating current applications.

If an uncharged capacitor, a resistor, a switch and a 12 V battery are connected in series, what is the voltage across the capacitor at the instant the switch is closed?

How much voltage is dropped across a capacitor after 3.33 seconds if it is charged by a 50 V source through a resistor?

With three capacitors in series, the current lags the voltage by:

Capacitance is a capacitorʹs ability to store resistance.

The removal of high frequency transient voltages with a capacitor is called:

A capacitor will fully charge in about five time constants.

-What is in Figure?

What is one time constant of a capacitor in series with a resistor?

Electrolytic capacitors must be connected into a circuit such that:

What is the capacitance that stores of charge and drops 25 V?

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

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

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

If an uncharged capacitor, a resistor, a switch and a 12 V battery are connected in series, what is the voltage across the capacitor after it is fully charged?

How long will it take for a capacitor to completely discharge through a resistor?

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

A commonplace use for capacitors in electronics is to:

If a capacitor and a resistor are connected in series across 30 , how much voltage will the capacitor drop after charging for just one time constant?

Upon checking the voltage output of a power supply with an oscilloscope, you notice an unusually large amount of ripple. What could possibly be the problem?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Inductors

Transformers

RC Circuits

RL Circuits

RlC Circuits and Resonance

Passive Filters

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters