Question 1

An advantage of mesh currents over branch currents is:

Accepted Answer

A)  The mesh current method can be applied to circuits with any number of loops. 
B)  The mesh current method requires fewer equations than the branch method. 
C)  There are no negative answers for current. 
D)  There are no advantages. 
A)  The mesh current method can be applied to circuits with any number of loops. 
B)  The mesh current method requires fewer equations than the branch method. 
C)  There are no negative answers for current. 
D)  There are no advantages. B

Question 2

-See Figure 9-3. Using R = 100 Ω, compute the current through the 50 Ω resistor.

Accepted Answer

A)  2.14 mA 
B)  21.47 µA 
C)  21.47 A 
D)  21.47 mA 
A)  2.14 mA 
B)  21.47 µA 
C)  21.47 A 
D)  21.47 mA D

Question 3

A node is where the voltage is connected to the circuit.

Accepted Answer

A) True 
 B)False  False

Question 4

-Given the circuit in Figure , find the approximate voltage drop across the 68 Ω resistor.

Accepted Answer

A)  1.36 V 
B)  14.28 V 
C)  11.69 V 
D)  12.92 V 
A)  1.36 V 
B)  14.28 V 
C)  11.69 V 
D)  12.92 V

Question 5

A branch current is an current through a branch, whereas: loop currents are .

Accepted Answer

A)  actual, circuit dependent 
B)  assumed, mathematical quantities 
C)  actual, mathematical 
D)  both A and B 
A)  actual, circuit dependent 
B)  assumed, mathematical quantities 
C)  actual, mathematical 
D)  both A and B

Question 6

A branch is a path that connects:

Accepted Answer

A)  two components 
B)  two multiple loop circuits 
C)  two loops 
D)  two nodes 
A)  two components 
B)  two multiple loop circuits 
C)  two loops 
D)  two nodes

Question 7

How many general steps are used in applying the branch current method?

Accepted Answer

A)  5 
B)  4 
C)  1 
D)  3 
A)  5 
B)  4 
C)  1 
D)  3

Question 8

What is the characteristic determinant from the following equations? 5I1 - 8I2 = 10
L0I1 + 5I2 = 20

Accepted Answer

A)  10 
B)  55 
C)  105 
D)  -90 
A)  10 
B)  55 
C)  105 
D)  -90

Question 9

-See Figure 9-4. If nodal analysis were to be used to solve for unknown voltages in this circuit, how many nodes would be needed including the reference node)?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 10

- If the branch current method is used, which equation describes loop 1?

Accepted Answer

A)  0 = -5 V - 3 Ω)I1 + 7 Ω)I2 
B)  0 = +5 V - 3 Ω)I1 + 7 Ω)I2 
C)  0 = +5 V + 3 Ω)I1 - 7 Ω)I2 
D)  0 = -5 V - 3 Ω)I1 - 7 Ω)I2 
A)  0 = -5 V - 3 Ω)I1 + 7 Ω)I2 
B)  0 = +5 V - 3 Ω)I1 + 7 Ω)I2 
C)  0 = +5 V + 3 Ω)I1 - 7 Ω)I2 
D)  0 = -5 V - 3 Ω)I1 - 7 Ω)I2

Question 11

What is the significance of a negative sign in the answer for current, when solving network problems?

Accepted Answer

A)  It means you must chose the correct direction for the actual, net, current flow. 
B)  It means that the negative current flows in the opposite direction from the assigned current. 
C)  It means you must subtract the negative value from the other value. 
D)  It means there is a negative current flow. 
A)  It means you must chose the correct direction for the actual, net, current flow. 
B)  It means that the negative current flows in the opposite direction from the assigned current. 
C)  It means you must subtract the negative value from the other value. 
D)  It means there is a negative current flow.

Question 12

A node is a junction of two or more current paths.

Accepted Answer

A) True 
 B)False

Question 13

-In Figure  what value of R will result in a balanced bridge?

Accepted Answer

A)  60 Ω 
B)  300 Ω 
C)  30 Ω 
D)  3 Ω 
A)  60 Ω 
B)  300 Ω 
C)  30 Ω 
D)  3 Ω

Question 14

What circuit law is used in the node voltage method?

Accepted Answer

A)  Kirchhoff's current law 
B)  Kirchhoff's voltage law 
C)  Ohm's law 
D)  the power law 
A)  Kirchhoff's current law 
B)  Kirchhoff's voltage law 
C)  Ohm's law 
D)  the power law

Question 15

What circuit law is used in the mesh current method?

Accepted Answer

A)  Kirchhoff's current law 
B)  Kirchhoff's voltage law 
C)  the power law 
D)  Ohm's law 
A)  Kirchhoff's current law 
B)  Kirchhoff's voltage law 
C)  the power law 
D)  Ohm's law

Question 16

The loop current direction must be drawn:

Accepted Answer

A)  counter-clockwise 
B)  clockwise 
C)  It doesn't matter, as long as you are consistent. 
A)  counter-clockwise 
B)  clockwise 
C)  It doesn't matter, as long as you are consistent.

Question 17

-Which of the following terms describes the voltage across the 7 Ω resistor when using mesh analysis?

Accepted Answer

A)  7 Ω) I2 
B)  7 Ω) I1 + I2 
C)  7 Ω) I1 
D)  7 Ω) I1 - I2 
A)  7 Ω) I2 
B)  7 Ω) I1 + I2 
C)  7 Ω) I1 
D)  7 Ω) I1 - I2

Question 18

Simultaneous equations can be solved by substitution or by using determinants.

Accepted Answer

A) True 
 B)False

Question 19

Delta to wye configurations are used in bridge circuits.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following are useful for analyzing circuits with two or more voltage or current sources?

Accepted Answer

A)  mesh current method 
B)  node-voltage method 
C)  branch current method 
D)  all of the above 
A)  mesh current method 
B)  node-voltage method 
C)  branch current method 
D)  all of the above

Exam 9: Branch, Loop, and Node Analyses

An advantage of mesh currents over branch currents is:

-See Figure 9-3. Using R = 100 Ω, compute the current through the 50 Ω resistor.

A node is where the voltage is connected to the circuit.

-Given the circuit in Figure , find the approximate voltage drop across the 68 Ω resistor.

A branch current is an current through a branch, whereas: loop currents are .

A branch is a path that connects:

How many general steps are used in applying the branch current method?

What is the characteristic determinant from the following equations? 5I1 - 8I2 = 10 L0I1 + 5I2 = 20

-See Figure 9-4. If nodal analysis were to be used to solve for unknown voltages in this circuit, how many nodes would be needed including the reference node)?

- If the branch current method is used, which equation describes loop 1?

What is the significance of a negative sign in the answer for current, when solving network problems?

A node is a junction of two or more current paths.

-In Figure what value of R will result in a balanced bridge?

What circuit law is used in the node voltage method?

What circuit law is used in the mesh current method?

The loop current direction must be drawn:

-Which of the following terms describes the voltage across the 7 Ω resistor when using mesh analysis?

Simultaneous equations can be solved by substitution or by using determinants.

Delta to wye configurations are used in bridge circuits.

Which of the following are useful for analyzing circuits with two or more voltage or current sources?

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