Question 1

When converting a wye configuration with all equal resistors to a delta configuration, the delta resistor will always be _ times its related wye resistor.

Accepted Answer

In a conversion from a wye (Y) configuration to a delta (Δ) configuration, each delta resistor is 3 times the value of its related wye resistor. This is because in the delta configuration, each resistor effectively sees the parallel combination of the other two wye resistors in addition to its own resistance, leading to a tripling in value.

Question 2

Thevenin's theorem states that the Thevenin voltage is equal to:

Accepted Answer

Thevenin's theorem states that the Thevenin voltage is equal to the open circuit voltage at the network's terminals.

Question 3

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

Accepted Answer

Superposition involves analyzing a linear network by considering one independent source at a time while all other independent sources are turned off (voltage sources are replaced by short circuits and current sources by open circuits). However, because power is proportional to the square of the current or voltage, when sources are considered individually, the nonlinear relationship between power and voltage/current means that the effects of power cannot simply be added together as is done with voltages or currents in superposition analysis.

Question 4

When using the superposition theorem on a two source network, if the current produced by one source is in one direction, while that produced by the other source is in the opposite direction through the same resistor:

Accepted Answer

The resulting current through a component when considering multiple sources in a network (using superposition theorem) is the algebraic sum of the currents due to each source individually. If the currents are in opposite directions, the net current is the difference between the two, and its direction is determined by the direction of the larger current.

Question 5

-The first steps to Nortonizing a circuit are:

Accepted Answer

The answer of  
-The first steps to Nortonizing a...

Question 6

Under maximum power transfer conditions, which one is true?

Accepted Answer

The maximum power transfer theorem states that maximum power is transferred from the source to the load when the load resistance equals the Thevenin (or Norton) resistance of the source.

Question 7

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

Accepted Answer

The thermistor is a temperature-sensitive resistor, so when its resistance changes due to temperature variations, it causes the Wheatstone bridge to become unbalanced. This unbalance is then measured to determine the change in temperature.

Question 8

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

Accepted Answer

The correct values for the Norton equivalent current (I_N) and resistance (R_N) are 27.1 mA and 59 Ω, respectively.

Question 9

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

The answer of  Figure 8-4
-Given the circuit in Figure...

Question 10

-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

Terminal equivalency is the correct term that describes the concept where two voltage sources are considered equivalent if they produce the same load voltage and load current for any given load resistance.

Question 11

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

Accepted Answer

An arrow inside a circle is commonly used to symbolize a current source in electrical diagrams and schematics.

Question 12

-Convert the Delta network in Figure  into a Wye network.

Accepted Answer

The answer of  
-Convert the Delta network in Figure...

Question 13

Delta to wye configurations are used in:

Accepted Answer

The answer of Delta to wye configurations are used in:
...

Question 14

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

Accepted Answer

Norton's theorem states that any linear electrical network with voltage and current sources and only resistances can be replaced at terminals A-B by an equivalent circuit consisting of an ideal current source in parallel with a resistor.

Question 15

Which of these statements is true of two or more current sources in parallel?

Accepted Answer

Current sources in parallel can be combined into a single equivalent current source by adding their currents together, according to the principle of superposition. This does not violate Kirchhoff's current law, nor does it require a series resistor in each branch, and the combined current is the sum of individual currents, not necessarily less than the smallest individual current.

Quiz 8: Circuit Theorems and Conversions

When converting a wye configuration with all equal resistors to a delta configuration, the delta resistor will always be _ times its related wye resistor.

Thevenin's theorem states that the Thevenin voltage is equal to:

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

When using the superposition theorem on a two source network, if the current produced by one source is in one direction, while that produced by the other source is in the opposite direction through the same resistor:

-The first steps to Nortonizing a circuit are:

Under maximum power transfer conditions, which one is true?

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

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

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) .

-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:

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

-Convert the Delta network in Figure into a Wye network.

Delta to wye configurations are used in:

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

Which of these statements is true of two or more current sources in parallel?

Quiz 8: Circuit Theorems and Conversions

When converting a wye configuration with all equal resistors to a delta configuration, the delta resistor will always be _ times its related wye resistor.

Thevenin's theorem states that the Thevenin voltage is equal to:

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

When using the superposition theorem on a two source network, if the current produced by one source is in one direction, while that produced by the other source is in the opposite direction through the same resistor:

-The first steps to Nortonizing a circuit are:

Under maximum power transfer conditions, which one is true?

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

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

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) .

-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:

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

-Convert the Delta network in Figure into a Wye network.

Delta to wye configurations are used in:

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

Which of these statements is true of two or more current sources in parallel?

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