Question 1

Figure \(8 R1  with an oscilloscope and you find no trace, a possible trouble might be that_________

Accepted Answer

A)   R2  is shorted 
B)   R2  is open 
C)   R1  is open 
D)  the resistance of  R2  has changed 
A)   R2  is shorted 
B)   R2  is open 
C)   R1  is open 
D)  the resistance of  R2  has changed

Question 2

The term RMS stands for ʺroot-mean-square.ʺ

Accepted Answer

A) True 
 B)False

Question 3

Superimposing an AC voltage of 3.54 Vrms with a DC source of 10 V results in a wave form that:

Accepted Answer

A) peaks at 15V. 
B) peaks at 13.54V. 
C) peaks at 20V. 
D) both B and C 
A) peaks at 15V. 
B) peaks at 13.54V. 
C) peaks at 20V. 
D) both B and C

Question 4

The value of a AC sine wave at any instant can be represented by:

Accepted Answer

A)  a phasor whose angle and magnitude are representative of the AC signal. 
B)  the formula  Vi=Vp* sin θ 
C)  a graph of the voltage or current vs. the angular measurement. 
D)  all of these. 
A)  a phasor whose angle and magnitude are representative of the AC signal. 
B)  the formula  Vi=Vp* sin θ 
C)  a graph of the voltage or current vs. the angular measurement. 
D)  all of these.

Question 5

Figure \(8 R1  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 6

The higher a sineW aveʹs frequency, the shorter its period.

Accepted Answer

A) True 
 B)False

Question 7

The symbol for the period of a Wave form is:

Accepted Answer

A) W. 
B) T. 
C) P. 
D) F. 
A) W. 
B) T. 
C) P. 
D) F.

Question 8

Figure \(8 1  shorts in Figure 8-2,  VR2__________

Accepted Answer

A)  decreases 
B)  remains the same 
C)  increases 
A)  decreases 
B)  remains the same 
C)  increases

Question 9

A  12 VP sine wave equals_______

Accepted Answer

A)   8.48 VRMS 
B)   7.64 VAVG 
C)   24 VPP 
D)  all of these 
A)   8.48 VRMS 
B)   7.64 VAVG 
C)   24 VPP 
D)  all of these

Question 10

Figure \(8 T 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 11

The time required by a 10 V square wave to change from 1 V to 9 V is known as the ________.

Accepted Answer

A)  fall time 
B)  pulse width 
C)  period 
D)  rise time 
A)  fall time 
B)  pulse width 
C)  period 
D)  rise time

Question 12

An oscilloscope's seconds/division switch is set on  20 ms/ div . If a sine wave measures 4 divisions horizontally, what frequency is being measured?

Accepted Answer

A)   12.5  Hz 
B)   25  Hz 
C)   50  Hz 
D)  More information is needed. 
A)   12.5  Hz 
B)   25  Hz 
C)   50  Hz 
D)  More information is needed.

Question 13

$$\text { Figure } 8 < 1$$
-In Figure 8-1, if the time from point A to H is 60 μs the frequency is ________.

Accepted Answer

A) 16.7 kHz 
B) 25 kHz 
C) 50 kHz 
D) More information is required to calculate the frequency. 
A) 16.7 kHz 
B) 25 kHz 
C) 50 kHz 
D) More information is required to calculate the frequency.

Question 14

Figure \(8 1  at an angle of  22°?

Accepted Answer

A)   8.03 V 
B)   2.56 V 
C)   20.3 V 
D)   12.0 V 
A)   8.03 V 
B)   2.56 V 
C)   20.3 V 
D)   12.0 V

Question 15

The period of a 5 Hz wave form is 200 ms.

Accepted Answer

A) True 
 B)False

Question 16

Commercial line voltages are usually square waves at a frequency of 60 Hz.

Accepted Answer

A) True 
 B)False

Question 17

The period of most ACW aveforms is measured in units of:

Accepted Answer

A) alternations. 
B) seconds. 
C) cycles. 
D) revolutions. 
A) alternations. 
B) seconds. 
C) cycles. 
D) revolutions.

Question 18

What is the approximate instantaneous voltage at  37° on a  169 VP sine wave?

Accepted Answer

A)   239  V 
B)   135  V 
C)   102  V 
D)   119  V 
A)   239  V 
B)   135  V 
C)   102  V 
D)   119  V

Question 19

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 20

$$\text { Figure } 8 < 1$$
-which of the following can be measured from points B to F in Figure 8-1?

Accepted Answer

A) the peak-to-peakVoltage 
B) the frequency 
C) the period 
D) the angle 
A) the peak-to-peakVoltage 
B) the frequency 
C) the period 
D) the angle

Figure $8 < 2$ -In Figure 8-2, if you look at V_R1 with an oscilloscope and you find no trace, a possible trouble might be that_________

The term RMS stands for ʺroot-mean-square.ʺ

Superimposing an AC voltage of 3.54 Vrms with a DC source of 10 V results in a wave form that:

The value of a AC sine wave at any instant can be represented by:

Figure $8 < 2$ -Find P_R1 in Figure 8-2.

The higher a sineW aveʹs frequency, the shorter its period.

The symbol for the period of a Wave form is:

Figure $8 < 2$ -If R₁ shorts in Figure 8-2, V_R2__________

A 12 V_P sine wave equals_______

Figure $8 < 2$ -Calculate I_T in Figure 8-2.

The time required by a 10 V square wave to change from 1 V to 9 V is known as the ________.

An oscilloscope's seconds/division switch is set on 20 ms/ div . If a sine wave measures 4 divisions horizontally, what frequency is being measured?

$\text { Figure } 8 < 1 -In Figure 8-1, if the time from point A to H is 60 μs the frequency is .$ $\text { Figure } 8 < 1$ -In Figure 8-1, if the time from point A to H is 60 μs the frequency is .

Figure $8 < 2$ -In Figure 8-2, what is the instantaneous voltage across R₁ at an angle of 22°?

The period of a 5 Hz wave form is 200 ms.

Commercial line voltages are usually square waves at a frequency of 60 Hz.

The period of most ACW aveforms is measured in units of:

What is the approximate instantaneous voltage at 37° on a 169 V_P sine wave?

The RMS value of a sine wave means__________

$\text { Figure } 8 < 1 -which of the following can be measured from points B to F in Figure 8-1?$ $\text { Figure } 8 < 1$ -which of the following can be measured from points B to F in Figure 8-1?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Capacitors

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 8: Introduction to Alternating Current and Voltage

Figure 8<28 < 28<2 -In Figure 8-2, if you look at VR1 with an oscilloscope and you find no trace, a possible trouble might be that_________

The term RMS stands for ʺroot-mean-square.ʺ

Superimposing an AC voltage of 3.54 Vrms with a DC source of 10 V results in a wave form that:

The value of a AC sine wave at any instant can be represented by:

Figure 8<28 < 28<2 -Find PR1 in Figure 8-2.

The higher a sineW aveʹs frequency, the shorter its period.

The symbol for the period of a Wave form is:

Figure 8<28 < 28<2 -If R1 shorts in Figure 8-2, VR2__________

A 12 VP sine wave equals_______

Figure 8<28 < 28<2 -Calculate IT in Figure 8-2.

The time required by a 10 V square wave to change from 1 V to 9 V is known as the ________.

An oscilloscope's seconds/division switch is set on 20 ms/ div . If a sine wave measures 4 divisions horizontally, what frequency is being measured?

Figure 8<1\text { Figure } 8 < 1 Figure 8<1 -In Figure 8-1, if the time from point A to H is 60 μs the frequency is ________.

Figure 8<28 < 28<2 -In Figure 8-2, what is the instantaneous voltage across R1 at an angle of 22°?

The period of a 5 Hz wave form is 200 ms.

Commercial line voltages are usually square waves at a frequency of 60 Hz.

The period of most ACW aveforms is measured in units of:

What is the approximate instantaneous voltage at 37° on a 169 VP sine wave?

The RMS value of a sine wave means__________

Figure 8<1\text { Figure } 8 < 1 Figure 8<1 -which of the following can be measured from points B to F in Figure 8-1?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Capacitors

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

Figure $8 < 2$ -In Figure 8-2, if you look at V_R1 with an oscilloscope and you find no trace, a possible trouble might be that_________

Figure $8 < 2$ -Find P_R1 in Figure 8-2.

Figure $8 < 2$ -If R₁ shorts in Figure 8-2, V_R2__________

A 12 V_P sine wave equals_______

Figure $8 < 2$ -Calculate I_T in Figure 8-2.

$\text { Figure } 8 < 1 -In Figure 8-1, if the time from point A to H is 60 μs the frequency is .$ $\text { Figure } 8 < 1$ -In Figure 8-1, if the time from point A to H is 60 μs the frequency is .

Figure $8 < 2$ -In Figure 8-2, what is the instantaneous voltage across R₁ at an angle of 22°?

What is the approximate instantaneous voltage at 37° on a 169 V_P sine wave?

$\text { Figure } 8 < 1 -which of the following can be measured from points B to F in Figure 8-1?$ $\text { Figure } 8 < 1$ -which of the following can be measured from points B to F in Figure 8-1?