Different ways to explain Ohm's Law

Through teaching methodologies, different ways to explain Ohm's law may be applied. By using an audiovisual resource as video clips are, depending on the kind of students to take the lesson, the message could be assumed by them in different levels of cognition. A first example of explanation could be a plain explanation, based directly on the Ohm's law formula.

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A second example is based on the application of the explanation by using the law directly applied to circuits

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A third example, only visual and textual with no sound or voice, introduces the making of an experiment with the previous presentation of the devices required, then assembling them together with the proper measurement devices and finally, with the retrieved data from voltmeter and ammeter let students to get the resistance by inductive method.

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A four example, my preferred type for students to be used to understand how to deal with the formula, magnitudes, units and effects, shows the needed visual tools, in order to put them together. The same way the student will do later alone in his/her study room.

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Anyway, some people like the teacher Daniel Sullivan, tries to analyze the considerations to take before explaining Ohm's law in order to let students to achieve significant learning. His considerations are based on the fact that people sometimes dismiss the law, or teach it poorly using outdated methods.

Phenomena related with light - Teaching class from MIT

Class in MIT uploaded in 2008. Walter Lewin, professor of physics at the Massachusetts Institute of Technology, sheds light on everyday phenomena such as rainbows and what makes the sky blue. Watch Lewin create a rainbow right in the lecture hall and other exciting demonstrations in this engaging and creative discussion of physics that sheds what lies beneath the everyday wonders of our world.

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Chesapeake Bay Impact Crater

Chesapeake Bay Impact Crater: A Cosmic Connection in Virginia

David Powars, as the presenter of the following podcast shows a talk, in which the three main points that he's going to hit are when/where the Chesapeake impact crater, so that everybody can leave here being able to tell a seven-year-old what an impact crater is and what the Chesapeake Bay impact crater is. How was it discovered? It's a unique crater. It was discovered by cores...

If the podcast do not work, try through this audio link from USGS

Podcast data

Recorded in February the 6th, 2013 as part of a public lecture, presented by David Powars in Reston, Virginia, USA

Audio Producer: Melanie Gade , U.S. Geological Survey