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 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!

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.