Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 23, Problem 12P
To determine
The number of factor that change the system of electrostatic potential energy.
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Two identical thin rings, each of radius R meter, are coax-
ially placed at a distance of R meter from each other. If
Q₁ coulomb and Q₂ coulomb are the charges uniformly
spread on the two rings, find the work done in moving a
charge q from the center of one ring to that of the other.
(a) Red blood cells often become charged and can be treated as point charges. Healthy red blood cells are negatively charged, but unhealthy cells (due to the presence of a bacteria, for example) can become positively charged. In the figure, three red blood cells are oriented such that they are located on the corners of an equilateral triangle. The red blood cell charges are
A = 2.20 pC, B = 7.50 pC,
and
C = −4.40 pC.
Given these charges, what would the magnitude and direction of the electric field be at cell A? (1 pC = 1 ✕ 10−12 C.)
magnitude
direction
(a) Point charges QI= -4 nC, Q2=7 nC and Q3= 5 nC are located at (4, -2, 5), (2, 6, -2) and (0, 0,
0), respectively. Find the potential at (-3, 7, 4), assuming V(∞) = 0.
(b) A potential field in free space is expressed as, V = 4psin2o + pz. Find the electric flux
density D at (5, ,4).
Chapter 23 Solutions
Physics for Scientists and Engineers
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