A-2.0 nC charge and a +2.0 nC charge are located on the x-axis at x = -1.0 cm and x = +1.0 cm, respectively. Part C Choose the correct graph of the electric field strength along the x-axis E -1.0 cm 1.0 cm HA NA E -1.0 cm 1.0 cm E # -1.0 cm 0 1.0 cm ||

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter24: Electric Fields
Section24.4: Electric Field Of A Collection Of Charged Particles
Problem 24.4CE: Figure 24.10 shows a source that consists of two charged particles. a. What is the sign of the...
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I don't understand why this is the correct graph, particularly why the electric field strength is negative between the charges.  Can you please explain?  

A-2.0 nC charge and a +2.0 nC charge are located on the x-axis at x = -1.0 cm and
x = +1.0 cm, respectively.
Part C
Choose the correct graph of the electric field strength along the x-axis
E
||
-1.0 cm
1.0 cm
-1.0 cm
T
I
E
0
E
1.0 cm
1
I
#
-1.0 cm
1.0 cm
I
1
I
Transcribed Image Text:A-2.0 nC charge and a +2.0 nC charge are located on the x-axis at x = -1.0 cm and x = +1.0 cm, respectively. Part C Choose the correct graph of the electric field strength along the x-axis E || -1.0 cm 1.0 cm -1.0 cm T I E 0 E 1.0 cm 1 I # -1.0 cm 1.0 cm I 1 I
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That did answer a lot of questions.  Thank you.  But where do you derive the equation E=(K|q|)/r?  My book says E=(K|q|)/r^2.  I tried re-arranging some equations to get your equation, but I can't figure it out.  Thanks.  

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