Main content

Electric current, resistivity, and Ohm's law

Learn
Introduction to circuits and Ohm's law
(Opens a modal)
Resistivity and conductivity
(Opens a modal)
Current, resistance, and resistivity review
(Opens a modal)
Electric potential difference and Ohm's law review
(Opens a modal)
Practice
Calculating resistance, voltage, and current using Ohm's lawGet 3 of 4 questions to level up!

Electric power and DC circuits

Learn
Electric power
(Opens a modal)
DC Circuit and electrical power review
(Opens a modal)
Practice
Characteristics of circuit diagramsGet 5 of 7 questions to level up!
Calculations from circuit diagramsGet 3 of 4 questions to level up!

Kirchhoff's junction rule

Learn
Kirchhoff's current law
(Opens a modal)
Kirchhoff's junction rule review
(Opens a modal)
Practice
Kirchhoff's junction ruleGet 6 of 8 questions to level up!

Kirchhoff's loop rule

Learn
Kirchhoff's voltage law
(Opens a modal)
Kirchhoff's loop rule review
(Opens a modal)
Practice
Kirchhoff's loop rule: Symbolic problemsGet 3 of 4 questions to level up!
Kirchhoff's loop rule calculationsGet 3 of 4 questions to level up!

Series and parallel resistors

Learn
Series resistors
(Opens a modal)
Parallel resistors (part 1)
(Opens a modal)
Parallel resistors (part 2)
(Opens a modal)
Parallel resistors (part 3)
(Opens a modal)
Resistors in series and parallel review
(Opens a modal)
Practice
Calculating equivalent resistance for series and parallel resistorsGet 3 of 4 questions to level up!

DC Ammeters and voltmeters

Learn
Voltmeters and Ammeters
(Opens a modal)
DC Ammeters and voltmeters review
(Opens a modal)
Practice
Using voltmeters and ammeters to measure potential difference and currentGet 3 of 4 questions to level up!

DC Circuit analysis

Learn
Current through resistor in parallel: Worked example
(Opens a modal)
Current due to closing a switch: worked example
(Opens a modal)
Practice
Advanced circuit analysisGet 5 of 7 questions to level up!
Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 900 Mastery points!

About this unit

Circuits make computers, digital cameras, and video games possible. Circuits are driving an unprecedented rate of change in how we live. In this unit, you'll learn about the physics behind the electronic devices we use.
AP® is a registered trademark of the College Board, which has not reviewed this resource.