string of 26 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 65 W. P1: One of the bulbs burns out. The lamp has a wire that shorts out the bulb filament when

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A string of 26 identical Christmas tree lights
are connected in series to a 120 V source. The
string dissipates 65 W.

P1: One of the bulbs burns out. The lamp has a
wire that shorts out the bulb filament when it
burns out, dropping the resistance of the bulb
to zero.
What is the resistance Rnew of the light
string now?
Answer in units of Ω.

P2: Find the power Pnew dissipated by the string
now.
Answer in units of W.

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