Why does the filament of a lightbulb glow while the connecting wires do not?
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Solution 20E The filament of a lightbulb is thin and so it experiences a very high resistance. This is in accordance with the relation R 1/A , R is resistance and A is the cross-section. The filament has a low area of cross-section and hence the resistance R is very high. This high resistance causes the electrons in the filament to collide more with the filament atoms during the passage of a current. Such a collision results in the formation of heat as the moving electrons lose a part of their kinetic energy to the filament’s atoms. Thus, the atoms get hotter and convert electrical energy to light energy. The connecting wires are thicker and hence the resistance in those wires is lower in value. Thus, not enough heat is generated in those wires during the passage of current.
Textbook: Conceptual Physics
Author: Paul G. Hewitt
The full step-by-step solution to problem: 20E from chapter: 23 was answered by , our top Physics solution expert on 04/03/17, 08:01AM. The answer to “Why does the filament of a lightbulb glow while the connecting wires do not?” is broken down into a number of easy to follow steps, and 14 words. Conceptual Physics was written by and is associated to the ISBN: 9780321909107. Since the solution to 20E from 23 chapter was answered, more than 323 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Conceptual Physics, edition: 12. This full solution covers the following key subjects: connecting, filament, glow, lightbulb, while. This expansive textbook survival guide covers 45 chapters, and 4650 solutions.