Free Practice Quiz Question List

2 Circuit Fundamentals Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Circuit Fundamentals, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

What does a circuit diagram primarily represent?

A
The electrical connections between components
B
The physical shape and placement of the wires
C
The materials used to make each component
D
The amount of current in every part of the circuit

True or false

1 point

Two components connected in series, with no branching between them, carry the same current.

A
True
B
False

Fill in the blank

1 point

Under the common schematic convention described, lines that cross without a junction dot are often shown as .

Written response

1 point

What is the electrical term for points joined by a wire into one connected point in a circuit?

Choose one

1 point

Two resistors of $12\ \Omega$ and $4\ \Omega$ are connected in parallel. What is their equivalent resistance?

A
$4\ \Omega$
B
$3\ \Omega$
C
$8\ \Omega$
D
$16\ \Omega$

Choose all

1 point

Select all statements that apply to components connected in parallel.

A
Both ends of each component connect to the same two nodes.
B
Each branch has the same voltage across it.
C
Current divides among the branches.
D
The equivalent resistance is less than the smallest individual resistance.

True or false

1 point

If one branch of a parallel circuit becomes open, other complete branches may still carry current.

A
True
B
False

Fill in the blank

1 point

The resistance of one resistor that can replace a network while producing the same overall voltage–current relationship at its terminals is called .

Choose one

1 point

A wire is accidentally connected directly across a lamp. What is a likely effect of this short circuit?

A
Current can be diverted around the lamp, so it may not light.
B
The lamp must receive a larger voltage drop and become brighter.
C
The wire turns the lamp and source into a series connection.
D
The circuit is guaranteed to have no current anywhere.

Written response

1 point

Two resistors of $8\ \Omega$ and $11\ \Omega$ are connected in series. What is their equivalent resistance in ohms?

Choose all

1 point

Select all statements that correctly describe short circuits and their possible effects.

A
It can create an unintended low-resistance bypass around a component.
B
A short across a voltage source can draw dangerously high current.
C
High current from a short can cause overheating or damage.
D
Any short across a voltage source is safe because the current is always negligible.

Written response

1 point

A $4\ \Omega$ resistor is in series with a parallel pair of $6\ \Omega$ and $3\ \Omega$ resistors. What is the total equivalent resistance in ohms?

Open ended

1 point

A $2\ \Omega$ resistor is in series with a parallel pair of $9\ \Omega$ and $18\ \Omega$ resistors. Explain the sequence of reductions and find the network’s total equivalent resistance.

Choose one

1 point

Why should a short circuit directly across a voltage source not be assumed safe?

A
The short circuit must have infinite resistance, so no current can flow.
B
A short circuit always makes the source voltage increase.
C
The short can draw dangerously high current and cause overheating or damage.
D
The short is safe whenever the source and wiring limit current.

Choose one

1 point

A circuit is redrawn with the same components and electrical connections, but the wires are routed in a different-looking pattern. What remains the same in the schematic?

A
It shows the physical shape and placement of the wires.
B
It shows which components and points are electrically connected.
C
It shows the exact length of each wire.
D
It shows how much current each component uses.

True or false

1 point

A parallel circuit has two complete branches. If one branch opens, the other complete branch may still carry current.

A
True
B
False

Choose one

1 point

Two resistors are connected end-to-end, but a third wire branches off from their shared connection point. Which statement correctly describes the two resistors?

A
They are in series because they share a connection point.
B
They are in series if their resistances are equal.
C
They are not in series because a branch connects at their shared point.
D
They are in parallel because they share a connection point.

Written response

1 point

In a parallel circuit, which electrical quantity is the same across every branch?

Choose one

1 point

A very-low-resistance wire is accidentally connected directly across a lamp. What is the likely effect of this short circuit?

A
The wire can bypass the lamp and divert current around it.
B
The wire forces all current through the lamp.
C
The wire makes the lamp a parallel equivalent resistance.
D
The wire guarantees that the lamp receives the source voltage.

Choose one

1 point

A $6\ \Omega$ resistor and a $3\ \Omega$ resistor are connected in parallel. What is their equivalent resistance?

A
$1\ \Omega$
B
$2\ \Omega$
C
$3\ \Omega$
D
$9\ \Omega$