Positive and negative charges of equal magnitude lie along the symmetry axis of a cylinder. The ...

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Positive and negative
charges of equal magnitude
lie along the symmetry axis
of a cylinder. The distance
from the positive charge to
the left-end cap of the cylinder is the same as the distance from the negative charge to the right-end cap.
What is the sign of the flux through the right-end cap of the cylinder?
(1) Positive
(2) Negative
(3) There is no flux through the right-end cap.
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