4. A plastic solid sphere is positively charged with volume charge density +p. The sphere has a radius a and centered at origin. Another empty sphere with radius b is placed at 2b cm away from the origin on y-axis. The small sphere has no charge in it. Find the electric field (E =?) at point P by using the Gaussian method (a > 3b, c > a). 0,2b,0 C --> X 0,0,0 a +p P.

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4. A plastic solid sphere is positively charged with volume charge density
+p. The sphere has a radius a and centered at origin. Another empty
sphere with radius b is placed at 2b cm away from the origin on y-axis.
The small sphere has no charge in it. Find the electric field (E =?) at point
P by using the Gaussian method (a > 3b, c > a).
0,2b,0
C
--> X
0,0,0
a
+p
P.
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Transcribed Image Text

4. A plastic solid sphere is positively charged with volume charge density +p. The sphere has a radius a and centered at origin. Another empty sphere with radius b is placed at 2b cm away from the origin on y-axis. The small sphere has no charge in it. Find the electric field (E =?) at point P by using the Gaussian method (a > 3b, c > a). 0,2b,0 C --> X 0,0,0 a +p P.

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