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
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
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 19PQ
Related questions
Question
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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