Answered: Lightbulb A is marked “25.0 W 120. V,”…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 62P

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Lightbulb A is marked “25.0 W 120. V,” and lightbulb B is
marked “100. W 120. V.” These labels mean that each lightbulb
has its respective power delivered to it when it is connected to
a constant 120. - V source. (a) Find the resistance of each lightbulb.
(b) During what time interval does 1.00 C pass into lightbulb
A? (c) Is this charge different upon its exit versus its entry
into the lightbulb? Explain. (d) In what time interval does
1.00 J pass into lightbulb A? (e) By what mechanisms does this
energy enter and exit the lightbulb? Explain. (f ) Find the cost
of running lightbulb A continuously for 30.0 days, assuming
the electric company sells its product at $0.110 per kWh.

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