Question 1

Superimposed DC and AC voltages mean the two voltages are combined:

Accepted Answer

A) in series-parallel aiding or opposing. 
B) in parallel aiding or opposing. 
C) in series aiding or opposing. 
D) all of these 
A) in series-parallel aiding or opposing. 
B) in parallel aiding or opposing. 
C) in series aiding or opposing. 
D) all of these C

Question 2

A sine waveʹs frequency equals the reciprocal of its period.

Accepted Answer

A) True 
 B)False  True

Question 3

RMS is another name for peak.

Accepted Answer

A) True 
 B)False  False

Question 4

-Calculate   in Figure 8-2.

Accepted Answer

A) 9.12 mAPP 
B) 3.22 mAPP 
C) 6.44 mAPP 
D) 4.55 mAPP 
A) 9.12 mAPP 
B) 3.22 mAPP 
C) 6.44 mAPP 
D) 4.55 mAPP

Question 5

The RMS value of a sine wave means ________.

Accepted Answer

A) the root mean square value 
B) the heating effect of an ac generator of the same voltage 
C) the same as IPP × R 
D) the same as IP × R 
A) the root mean square value 
B) the heating effect of an ac generator of the same voltage 
C) the same as IPP × R 
D) the same as IP × R

Question 6

-What is the approximate peak input voltage to the circuit in Figure 8-2?

Accepted Answer

A) 20 VP 
B) 28.3 VP 
C) 10 VP 
D) 14.1 VP 
A) 20 VP 
B) 28.3 VP 
C) 10 VP 
D) 14.1 VP

Question 7

An oscilloscopeʹs seconds/division switch is set on   . period?

Accepted Answer

A)    
B)    
C)    
D) 0.0015 s 
A)    
B)    
C)    
D) 0.0015 s

Question 8

-Find   in Figure 8-2.

Accepted Answer

A) 0 W 
B) 196 mW 
C) 48.9 mW 
D) 97.8 mW 
A) 0 W 
B) 196 mW 
C) 48.9 mW 
D) 97.8 mW

Question 9

A 10 VP sine wave is equal to ________.

Accepted Answer

A) 20 VPP 
B) 100 VPP 
C) 5 VPP 
D) none of the above 
A) 20 VPP 
B) 100 VPP 
C) 5 VPP 
D) none of the above

Question 10

-If a rectangular waveʹs pulse width is   and its frequency is 4 kHz, its duty cycle is ________.

Accepted Answer

A) 98.75% 
B) 20% 
C) 1.25% 
D) 80% 
A) 98.75% 
B) 20% 
C) 1.25% 
D) 80%

Question 11

-Which one of the following represents the value at point G in Figure 8-1?

Accepted Answer

A) the period 
B) the peak voltage 
C) the frequency 
D) the RMS voltage 
A) the period 
B) the peak voltage 
C) the frequency 
D) the RMS voltage

Question 12

A formula for VRMS is ________.

Accepted Answer

A) 2 × VP 
B) 2.8 × VP 
C) 0.707 × VP 
D) 0.707 × VPP 
A) 2 × VP 
B) 2.8 × VP 
C) 0.707 × VP 
D) 0.707 × VPP

Question 13

One complete sine wave contains 360°.

Accepted Answer

A) True 
 B)False

Question 14

-Calculate   in Figure .

Accepted Answer

A) 6.84 VPP 
B) 6.84 VP 
C) 13.15 VP 
D) 4.84 VP 
A) 6.84 VPP 
B) 6.84 VP 
C) 13.15 VP 
D) 4.84 VP

Question 15

A sine waveʹs peak value is smaller than its RMS value.

Accepted Answer

A) True 
 B)False

Question 16

-VPP is measured between points ________ in Figure.

Accepted Answer

A) A and B 
B) D and F 
C) G and I 
D) C and H 
A) A and B 
B) D and F 
C) G and I 
D) C and H

Question 17

The average value of a rectangular pulse wave is calculated as:

Accepted Answer

A) Vavg = 0.637 Vp. 
B) Vavg = Vbaseline + (duty cycle)× Vp. 
C) Vavg = 1.57 Vp. 
D) Vavg = Vbaseline + Vp. 
A) Vavg = 0.637 Vp. 
B) Vavg = Vbaseline + (duty cycle)× Vp. 
C) Vavg = 1.57 Vp. 
D) Vavg = Vbaseline + Vp.

Question 18

-In Figure 8-2, what is the instantaneous voltage across

Accepted Answer

A) 11.2 V 
B) 11.6 V 
C) 5.8 V 
D) 18.2 V 
A) 11.2 V 
B) 11.6 V 
C) 5.8 V 
D) 18.2 V

Question 19

-In Figure 8-2, if you look at VR1 with an oscilloscope and you find no trace, a possible trouble might be that ________.

Accepted Answer

A)    is shorted 
B)    is open 
C)    is open 
D)    has changed 
A)    is shorted 
B)    is open 
C)    is open 
D)    has changed

Question 20

If the period of a square wave is 22 ms, what is its frequency?

Accepted Answer

A) 45.5 kHz 
B) 45.5 Hz 
C) 22 kHz 
D) 22 Hz 
A) 45.5 kHz 
B) 45.5 Hz 
C) 22 kHz 
D) 22 Hz

Exam 8: Circuit Theorems and Conversions

Superimposed DC and AC voltages mean the two voltages are combined:

A sine waveʹs frequency equals the reciprocal of its period.

RMS is another name for peak.

-Calculate in Figure 8-2.

The RMS value of a sine wave means ________.

-What is the approximate peak input voltage to the circuit in Figure 8-2?

An oscilloscopeʹs seconds/division switch is set on . period?

-Find in Figure 8-2.

A 10 VP sine wave is equal to ________.

-If a rectangular waveʹs pulse width is and its frequency is 4 kHz, its duty cycle is ________.

-Which one of the following represents the value at point G in Figure 8-1?

A formula for VRMS is ________.

One complete sine wave contains 360°.

-Calculate in Figure .

A sine waveʹs peak value is smaller than its RMS value.

-VPP is measured between points ________ in Figure.

The average value of a rectangular pulse wave is calculated as:

-In Figure 8-2, what is the instantaneous voltage across

-In Figure 8-2, if you look at VR1 with an oscilloscope and you find no trace, a possible trouble might be that ________.

If the period of a square wave is 22 ms, what is its frequency?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Branch, Loop, and Node Analyses

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