Physics for Scientists and Engineers, Vol. 1
6th Edition
ISBN: 9781429201322
Author: Paul A. Tipler, Gene Mosca
Publisher: Macmillan Higher Education
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Chapter 25, Problem 3P
To determine
Wire which has higher number density (number per unit volume) of charge carriers.
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A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). Such a battery is listed as having a capacity of Q = 8.5E-08 C.
Part (a) How many free electrons does the battery contain, N?
N =
Part (b) If there are 1.0 million electrons moving through the phone every second how long will the battery last in seconds?
t =
Part (c) Current, I, is given in amps which are coulombs per second. What is the current passing through the phone?
I =
A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). Such a battery is listed as having a capacity of Q = 5.5E-08 C.
Part (a) How many free electrons does the battery contain, N?
Part (b) If there are 1.0 million electrons moving through the phone every second how long will the battery last in seconds?
Part (c) Current, I, is given in amps which are coulombs per second. What is the current passing through the phone?
How long does it take electrons to get from a car
battery to the starting motor? Assume the current is 300 A and
the electrons travel through a copper wire with cross-sectional area
0.21 cm² and length 0.85 m. The number of charge carriers per unit
volume is 8.49 x 1028 m-³.
Chapter 25 Solutions
Physics for Scientists and Engineers, Vol. 1
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