Malcolm and Angus Young developed an idea for a band's name after their sister, Margaret Young, saw the initials "AC/DC" on a sewing machine. Although this video is not about a famous rock band, it does explain alternating versus direct current and graphs both currents so viewers can visualize the differences. 

Concepts

electric currents, alternating current/direct current, frequency, hertz, periods

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Additional Tags

science

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Instructional Ideas

• Bring in items that use AC and DC and see if class members can figure out the difference

Classroom Considerations

• Remember YouTube comments are open to anyone who wants to submit a comment
• Requires prior knowledge of how electric currents work
• The 27th in a series of 49 videos

• This video is hosted on YouTube

Pros

• Ideal for visual learners
• Includes closed captioning and a full written script, an added bonus

Cons

• None