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: 14

Answer

At this low frequency, the filament has enough time to cool down and become noticeably dim during the low-current portions of the cycle, causing the light to flicker.

Work Step by Step

At a frequency of 5 Hz, the tungsten filament in the old-fashioned light bulb will hit maximum power 10 times per second. (The current reaches its maximum magnitude twice during the period of 1/5 of a second, once for the current flow in each direction.)
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