Free Practice Quiz Question List

1 Electrical Quantities and Ohm’s Law Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Electrical Quantities and Ohm’s Law, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

A current of 2 A carries 2 C of charge past a point each second. True or false?

A
True
B
False

Choose one

1 point

A source transfers 18 J of energy to 3 C of charge. What is the potential difference between the two points?

A
3 V
B
6 V
C
9 V
D
54 V

Fill in the blank

1 point

A steady current carries 15 C of charge past a point in 5 s. The current is A.

Written response

1 point

An ohmic component has a voltage of 24 V across it and a current of 4 A through it. What is its resistance in ohms?

True or false

1 point

For an ohmic resistor with fixed resistance, increasing the voltage across it increases the current through it. True or false?

A
True
B
False

Choose one

1 point

A circuit element has 9 V across it and carries a current of 2 A. What is its electrical power?

A
4.5 W
B
11 W
C
18 W
D
36 W

Fill in the blank

1 point

A device transfers energy at a rate of 40 W for 2 min. It transfers J of energy.

Choose all

1 point

Select all statements that are supported by Ohm’s law and its stated limits.

A
For an ohmic component under the conditions considered, voltage is proportional to current.
B
At fixed voltage, increasing the resistance of an ohmic component decreases its current.
C
Every electrical component has voltage proportional to current under all conditions.
D
For an ohmic resistor, voltage, current, and resistance are related by $V = IR$ .

Choose one

1 point

A steady current of 1.5 A flows for 8 s. How much charge passes a point in the circuit?

A
0.1875 C
B
9.5 C
C
12 C
D
13.5 C

Written response

1 point

What electrical quantity describes the rate of energy transfer?

Choose all

1 point

A 5 Ω ohmic resistor is connected to a 15 V source for 4 s. Select all statements that correctly describe the resistor during this interval.

A
The current is 3 A.
B
The power is 20 W.
C
The energy transferred in 4 s is 180 J.
D
The charge passing through in 4 s is 12 C.

Written response

1 point

A 60 Ω ohmic resistor has 120 V across it. What is its power in watts?

Choose one

1 point

A household device uses 0.5 kWh of electrical energy. Which value is equivalent in joules?

A
$1.8 \times 10^3$ J
B
$1.8 \times 10^6$ J
C
$3.6 \times 10^6$ J
D
$7.2 \times 10^6$ J

Open ended

1 point

A 10 Ω ohmic resistor is connected to a 20 V source for 30 s. Calculate the current, the power, the energy transferred, and the charge that passes through the resistor. Show how the energy result agrees with the product of voltage and charge.

True or false

1 point

True or false: Voltage is measured between two points in a circuit.

A
True
B
False

Choose one

1 point

A transfer of $36\,\text{J}$ of energy moves $6\,\text{C}$ of charge between two points. What is the potential difference?

A
$4\,\text{V}$
B
$6\,\text{V}$
C
$30\,\text{V}$
D
$216\,\text{V}$

Choose one

1 point

A total of $24\,\text{C}$ of charge passes a point in $8\,\text{s}$ . What is the current?

A
$0.33\,\text{A}$
B
$2\,\text{A}$
C
$3\,\text{A}$
D
$32\,\text{A}$

Choose one

1 point

An ohmic resistor has resistance $6\,\Omega$ and is connected across an $18\,\text{V}$ source. What current flows through it?

A
$0.33\,\text{A}$
B
$3\,\text{A}$
C
$12\,\text{A}$
D
$108\,\text{A}$

Choose one

1 point

A circuit element has a potential difference of $12\,\text{V}$ across it and carries a current of $2\,\text{A}$ . What is its electrical power?

A
$6\,\text{W}$
B
$14\,\text{W}$
C
$24\,\text{W}$
D
$36\,\text{W}$

Written response

1 point

An ohmic component has a potential difference of $15\,\text{V}$ across it and carries $2.5\,\text{A}$ . What is its resistance? Enter the resistance value in ohms.