Figure 23-48 gives the magnitude of the electric field inside and outside a sphere with a...
Figure 23-48 gives the magnitude
of the electric field inside and outside a sphere with a positive
charge distributed uniformly through-out its volume. The scale of
the vertical axis is set by Es = 5.1 × 107 N/C.
What is the charge on the sphere?
Homework Answers
Note: electric field on the surface and beyond of a spherical
charge distribution is same as that of whole charge of the
distribution placed at center.
In this case, Es = 5 x 107 N/C ,
as shown in the given figure.
Radius of the sphere, R = 2 cm = 0.02 m
Es = (1/4πε) Q/R2
5 x 107 = 9 x 109 x Q / (0.02)2
Q = 5 x 107 x 0.02x 0.02 / (9 x 109 ) = 2.22 x 10-6 C
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Figure 23-48 gives the magnitude
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Figure a shows three plastic sheets that are large, parallel,
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set by Es = 13.5 × 107 N/C. Approximately, what is the net charge
on the shell?
E (107N/C) 24 r(cm) 8 10
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