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Electromagnetism 101

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Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet.

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Interactive Simulation

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See how the equation form of Ohm's law relates to a simple circuit. Adjust the voltage and resistance, and see the current change according to Ohm's law.

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Interactive Simulation

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Topics

Description

Explore the interactions between a compass and bar magnet. Discover how you can use a battery and wire to make a magnet! Can you make it a stronger magnet? Can you make the magnetic field reverse?

Sample Learning Goals

Predict the direction of the magnet field for different locations around a bar magnet and electromagnet

Compare and contrast bar magnets and electromagnets

Identify the characteristics of electromagnets that are variable and what effects each variable has on the magnetic field's strength and direction

Relate magnetic field strength to distance quantitatively and qualitatively

Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

Teacher-Submitted Activities

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Explore the interactions between a compass and bar magnet. Discover how you can use a battery and wire to make a magnet! Can you make it a stronger magnet? Can you make the magnetic field reverse?

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Static Electricity Interactive Simulator

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Play with John's foot and arm to explore when he gets a shock!

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Interactive Simulation/Game

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Topics

Description

Play hockey with electric charges. Place charges on the ice, then hit start to try to get the puck in the goal. View the electric field. Trace the puck's motion. Make the game harder by placing walls in front of the goal. This is a clone of the popular simulation of the same name marketed by Physics Academic Software and written by Prof. Ruth Chabay of the Dept of Physics at North Carolina State University.

Sample Learning Goals

Determine the variables that affect how charged bodies interact.

Predict how charged bodies will interact.

Describe the strength and direction of the electric field around a charged body.

Use free-body diagrams and vector addition to help explain the interactions.

Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

Teacher-Submitted Activities

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Play hockey with electric charges. Place charges on the ice, then hit start to try to get the puck in the goal. View the electric field. Trace the puck's motion. Make the game harder by placing walls in front of the goal.

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Charges and Fields Interactive Simulation

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Arrange positive and negative charges in space and view the resulting electric field and electrostatic potential. Plot equipotential lines and discover their relationship to the electric field. Create models of dipoles, capacitors, and more!

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Circuit Interactive Simulation

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Topics

Description

This new version of the CCK adds capacitors, inductors and AC voltage sources to your toolbox! Now you can graph the current and voltage as a function of time.

Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

Teacher-Submitted Activities

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This new version of the CCK adds capacitors, inductors and AC voltage sources to your toolbox! Now you can graph the current and voltage as a function of time. Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

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Practice Test

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Free gamified quizzes on every subject that students play in class and at home. Pick an existing quiz or create your own for review, formative assessment, and more.

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Practice Test

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Free gamified quizzes on every subject that students play in class and at home. Pick an existing quiz or create your own for review, formative assessment, and more.