Consider the following image. (a) Find the net electric flux through the closed
ID: 1407936 • Letter: C
Question
Consider the following image.
(a) Find the net electric flux through the closed spherical surface in a uniform electric field shown in Figure a. (Use any variable or symbol stated above along with the following as necessary: E and .)
=
(b) Find the net electric flux through the closed cylindrical surface shown in Figure b. (Use any variable or symbol stated above along with the following as necessary: E and .)
=
(c) What can you conclude about the charges, if any, inside the cylindrical surface?
Explanation / Answer
(a)
flux through the left surface = -E*2*pi*R^2
flux through the rigt surface = +E*2*pi*R^2
totla flux = 0
(b)
flux through the left surface = +E*pi*R^2
flux through the rigt surface = +E*pi*R^2
total flux = Etot = 2*E*pi*R^2
(c)
from gauss law
totl flux = q(inside)/eo
E*2*pi*R^2 = qinside/eo
q(inside) = E*2*pi*R^2*eo <<------answer
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