Lesson test: Node voltages and equivalent sources

1.[2p]
Node analysis solves a circuit by

making the node voltages the unknowns and applying the current law at each node

Correct

collapsing series and parallel groups only

The answer is: making the node voltages the unknowns and applying the current law at each node

ignoring Kirchhoff's laws

The answer is: making the node voltages the unknowns and applying the current law at each node

measuring every branch current directly

The answer is: making the node voltages the unknowns and applying the current law at each node

2.[2p]
A node at voltage $V$ connects through 1000 ohms to a 10 V supply and through 1000 ohms to ground. What is $V$ , in volts?

CorrectNot quite: 5

3.[2p]
Thevenin's theorem says any two-terminal network of sources and resistors behaves like

a single voltage source in series with a single resistance

Correct

a single resistor alone

The answer is: a single voltage source in series with a single resistance

a single current source alone

The answer is: a single voltage source in series with a single resistance

two capacitors

The answer is: a single voltage source in series with a single resistance

4.[2p]
The Thevenin voltage of a network is

the open-circuit voltage across its two terminals with nothing connected

Correct

the voltage with the terminals shorted

The answer is: the open-circuit voltage across its two terminals with nothing connected

the largest resistor in the network

The answer is: the open-circuit voltage across its two terminals with nothing connected

the supply current

The answer is: the open-circuit voltage across its two terminals with nothing connected

5.[3p]
A 12 V supply feeds two 1000 ohm resistors in series. Looking across the second resistor, what is the Thevenin resistance, in ohms?

CorrectNot quite: 500

6.[2p]
A battery's internal resistance is precisely its

Thevenin resistance, which is why its terminal voltage sags under load

Correct

Thevenin voltage

The answer is: Thevenin resistance, which is why its terminal voltage sags under load

open-circuit current

The answer is: Thevenin resistance, which is why its terminal voltage sags under load

capacitance

The answer is: Thevenin resistance, which is why its terminal voltage sags under load

7.[1p]
A source with a low equivalent resistance holds its voltage nearly steady as more current is drawn.

True

Correct

False

The answer is: True

1.[2p] Node analysis solves a circuit by

2.[2p] A node at voltage V connects through 1000 ohms to a 10 V supply and through 1000 ohms to ground. What is V, in volts?

3.[2p] Thevenin's theorem says any two-terminal network of sources and resistors behaves like

4.[2p] The Thevenin voltage of a network is

5.[3p] A 12 V supply feeds two 1000 ohm resistors in series. Looking across the second resistor, what is the Thevenin resistance, in ohms?

6.[2p] A battery's internal resistance is precisely its

7.[1p] A source with a low equivalent resistance holds its voltage nearly steady as more current is drawn.

1.[2p]
Node analysis solves a circuit by

2.[2p]
A node at voltage $V$ connects through 1000 ohms to a 10 V supply and through 1000 ohms to ground. What is $V$ , in volts?

3.[2p]
Thevenin's theorem says any two-terminal network of sources and resistors behaves like

4.[2p]
The Thevenin voltage of a network is

5.[3p]
A 12 V supply feeds two 1000 ohm resistors in series. Looking across the second resistor, what is the Thevenin resistance, in ohms?

6.[2p]
A battery's internal resistance is precisely its

7.[1p]
A source with a low equivalent resistance holds its voltage nearly steady as more current is drawn.