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Unit: DC Circuits

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Electric current, resistivity, and Ohm's law

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

Electric power and DC circuits

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Electric power
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DC Circuit and electrical power review
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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

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Kirchhoff's current law
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Kirchhoff's junction rule review
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Practice
Kirchhoff's junction ruleGet 6 of 8 questions to level up!

Kirchhoff's loop rule

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Kirchhoff's voltage law
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Kirchhoff's loop rule review
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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

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

DC Ammeters and voltmeters

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Voltmeters and Ammeters
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DC Ammeters and voltmeters review
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Practice
Using voltmeters and ammeters to measure potential difference and currentGet 3 of 4 questions to level up!

DC Circuit analysis

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Current through resistor in parallel: Worked example
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Current due to closing a switch: worked example
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Practice
Advanced circuit analysisGet 5 of 7 questions to level up!
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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.
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