Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 18 - Electric Currents - Questions: 15


AC power reverses the current repeatedly at a high enough speed that there is not enough time in between for the light to go out.

Work Step by Step

The voltage goes up and down in a sine wave fashion, and every time the voltage direction reverses, the potential energy of the electrons is raised. In other words, with every trip through the light bulb filament, the electrons give up some potential energy to the filament (which outputs heat and light), but get it back again.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.