Question 1

N,)  and RN, with RL disconnected. A)  IN = 296 mA, RN = 59 Ω B)  IN = 296 mA, RN = 174 Ω C)  IN = 27.1 mA, RN = 59 Ω D)  IN = 27.1 mA, RN = 14.6 Ω" class="answers-bank-image d-inline" rel="preload" > 
-Given the circuit in Figure , Calculate the current IN,)  and RN, with RL disconnected.

Accepted Answer

A)   IN = 296 mA, RN = 59 Ω
B)   IN = 296 mA, RN = 174 Ω
C)   IN = 27.1 mA, RN = 59 Ω
D)   IN = 27.1 mA, RN = 14.6 ΩE) A) and B)
F) A) and C)

Question 2

An ideal voltage source has infinite internal resistance.

Accepted Answer

A) True 
 B)False

Question 3

Norton's theorem states that you can replace a dc network with an equivalent circuit consisting of:

Accepted Answer

A)   a current source and a parallel resistor
B)   a current source and a series resistor
C)   a voltage source and a series resistor
D)   a voltage source and a parallel resistorE) B) and C)
F) A) and C)

Question 4

Figure 8-2
-Maximum power is delivered to the load under what conditions?

Accepted Answer

A)   when the load resistance equals zero
B)   when the load resistance equals the source resistance
C)   when the load resistance is greater than the source resistance
D)   when the load resistance is openE) B) and C)
F) C) and D)

Question 5

The internal resistance of an ideal voltage source is:

Accepted Answer

A)   infinite
B)   low
C)   zero
D)   highE) A) and B)
F) None of the above

Question 6

Maximum power transfer occurs when the load resistance equals the source resistance.

Accepted Answer

A) True 
 B)False

Question 7

Power effects in a dc network cannot be determined using superposition because:

Accepted Answer

A)   power computations require a voltage and a current source in each circuit.
B)   power is proportional to the square of the current or voltage.
C)   open sources and shorted sources neither consume nor produce power.
D)   all voltage and current sources are ideal devices that consume no power.E) None of the above
F) All of the above

Question 8

A practical current source has infinite internal resistance.

Accepted Answer

A) True 
 B)False

Question 9

When a thermistor is used in a basic Wheatstone bridge measuring circuit, the bridge becomes as the thermistor's resistance changes with .

Accepted Answer

A)   balanced, changes in current
B)   balanced, changes in light
C)   balanced, changes in pressure
D)   unbalanced, changes in temperatureE) A) and D)
F) B) and D)

Question 10

The superposition theorem is used to simplify circuit analysis where two or more sources are present.

Accepted Answer

A) True 
 B)False  True

Question 11

S = 2.0 A, RS = 40 Ω B)  IS = 2.5 A, RS = 40 Ω C)  IS = 2.5 A, RS = zero Ω D)  IS = 2.5 A, RS = infinite" class="answers-bank-image d-inline" rel="preload" > 
-What is the equivalent current source when VS = 100 V, RS = 40 Ω?

Accepted Answer

A)   IS = 2.0 A, RS = 40 Ω
B)   IS = 2.5 A, RS = 40 Ω
C)   IS = 2.5 A, RS = zero Ω
D)   IS = 2.5 A, RS = infiniteE) All of the above
F) A) and D)

Question 12

Thevenin's theorem is used to simplify complex networks to a simple voltage source with its source resistance.

Accepted Answer

A) True 
 B)False

Question 13

What is the symbol usually used inside a circle to designate a current source?

Accepted Answer

A)   an arrow
B)   a circle
C)   a current wave
D)   a sine waveE) B) and D)
F) A) and B)

Question 14

-The concept that states the equivalency of two voltage sources means that for any given load resistance connected to the two sources, the same load voltage and load current are produced by both sources is called:

Accepted Answer

A)   junction equivalency
B)   loop equivalency
C)   terminal equivalency
D)   load equivalencyE) C) and D)
F) B) and D) C

Question 15

-Given the circuit in Figure, Calculate VTH and RTH.

Accepted Answer

A)   VTH = 10 V, RTH = 50 Ω
B)   VTH = 10 V, RTH = 150 Ω
C)   VTH = 6.7 V, RTH = 150 Ω
D)   VTH = 5.0 V, RTH = 50 ΩE) A) and B)
F) B) and C)

Question 16

Calculate the voltage output of a source, when the source voltage equals 50 V, the source internal resistance is 10 Ω and the load resistance is 50 Ω.

Accepted Answer

A)   8.33 V
B)   40 V
C)   41.67 V
D)   10 VE) B) and C)
F) A) and C)

Question 17

A practical voltage source has infinite internal resistance.

Accepted Answer

A) True 
 B)False

Question 18

Figure 8-4
-Given the circuit in Figure 8-4, Thevenize the bridge circuit between points "A" and "B". Find the current flow through the load RL) .

Accepted Answer

A)   0.69 mA
B)   1.92 mA
C)   3.2 mA
D)   0.45 mAE) All of the above
F) B) and C)

Question 19

Delta to wye configurations are used in:

Accepted Answer

A)   non-sinusoidal networks
B)   polyphase circuits
C)   bridge circuits
D)   resonance circuitsE) All of the above
F) B) and C)

Question 20

-The first steps to Nortonizing a circuit are:

Accepted Answer

A)   open RL, determine RN, make VS = IN
B)   short RL, determine IL, make IL = IN RRR  N
C)   short RL, determine RN, make VS = IN
D)   open RL, determine IL, make IL = IN RRR  N E) A) and D)
F) B) and C) B

Exam 8: Circuit Theorems and Conversions

-Given the circuit in Figure , Calculate the current IN,) and RN, with RL disconnected.

Correct AnswerverifiedShow Answer

An ideal voltage source has infinite internal resistance.

Correct AnswerverifiedShow Answer

Norton's theorem states that you can replace a dc network with an equivalent circuit consisting of:

Correct AnswerverifiedShow Answer

Figure 8-2 -Maximum power is delivered to the load under what conditions?

Correct AnswerverifiedShow Answer

The internal resistance of an ideal voltage source is:

Correct AnswerverifiedShow Answer

Maximum power transfer occurs when the load resistance equals the source resistance.

Correct AnswerverifiedShow Answer

Power effects in a dc network cannot be determined using superposition because:

Correct AnswerverifiedShow Answer

A practical current source has infinite internal resistance.

Correct AnswerverifiedShow Answer

When a thermistor is used in a basic Wheatstone bridge measuring circuit, the bridge becomes as the thermistor's resistance changes with .

Correct AnswerverifiedShow Answer

The superposition theorem is used to simplify circuit analysis where two or more sources are present.

Correct AnswerverifiedTrue

-What is the equivalent current source when VS = 100 V, RS = 40 Ω?

Correct AnswerverifiedShow Answer

Thevenin's theorem is used to simplify complex networks to a simple voltage source with its source resistance.

Correct AnswerverifiedShow Answer

What is the symbol usually used inside a circle to designate a current source?

Correct AnswerverifiedShow Answer

-The concept that states the equivalency of two voltage sources means that for any given load resistance connected to the two sources, the same load voltage and load current are produced by both sources is called:

Correct AnswerverifiedC

-Given the circuit in Figure, Calculate VTH and RTH.

Correct AnswerverifiedShow Answer

Calculate the voltage output of a source, when the source voltage equals 50 V, the source internal resistance is 10 Ω and the load resistance is 50 Ω.

Correct AnswerverifiedShow Answer

A practical voltage source has infinite internal resistance.

Correct AnswerverifiedShow Answer

Figure 8-4 -Given the circuit in Figure 8-4, Thevenize the bridge circuit between points "A" and "B". Find the current flow through the load RL) .

Correct AnswerverifiedShow Answer

Delta to wye configurations are used in:

Correct AnswerverifiedShow Answer

-The first steps to Nortonizing a circuit are:

Correct AnswerverifiedB

-Given the circuit in Figure , Calculate the current I_N,) and R_N, with R_L disconnected.

Correct Answer
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True

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C

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B