Now accessible on mobile devices, Physlet Physics 3E provides a highly interactive way to explore, visualize, and solve problems related to fundamental physics. This link takes you to the chapter on magnetic fields and forces. It addresses magnets, Earth's magnetic field, mass spectrometry, magnetic force on currents, ferromagnetism, field line, particle trajectory in magnetic fields, and more. Physlets were developed to incorporate evidence-based best practices in physics education. Each individual resource is presented as an animation or simulation that represents a focused physical phenomenon. By using the interactive tools, students are able to visualize systems and processes at scales they otherwise cannot easily "see". As the student progresses through the exercises, concepts are reinforced with mathematics as appropriate.

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With this Physlet simulation, you can visualize Earth's magnetic field in two ways: as magnetic field vectors or as field lines. You can drop in a compass and move it around as well. See if students can figure out which way a compass will point at different locations on Earth. Why we like it: this sim is a great way to illustrate that a compass arrow lines up with the field vectors in a magnetic field.

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