Why do incandescent lightbulbs grow dim late in their lives, particularly just before their filaments break?
Step 1 of 3
The resistance of the filament increases as the bulb ages due to repeated heating and cooling and reduction in the thickness of the filament.
So, with the applied voltage staying the same, the current flow through the filament decreases and the bulb glows less bright when it gets old.
Textbook: College Physics
Author: Paul Peter Urone, Roger Hinrichs
This textbook survival guide was created for the textbook: College Physics , edition: 1. Since the solution to 13CQ from 20 chapter was answered, more than 614 students have viewed the full step-by-step answer. The answer to “Why do incandescent lightbulbs grow dim late in their lives, particularly just before their filaments break?” is broken down into a number of easy to follow steps, and 16 words. This full solution covers the following key subjects: Before, break, dim, filaments, grow. This expansive textbook survival guide covers 34 chapters, and 3125 solutions. The full step-by-step solution to problem: 13CQ from chapter: 20 was answered by , our top Physics solution expert on 07/07/17, 04:39PM. College Physics was written by and is associated to the ISBN: 9781938168000.