Problem 28: An infinite plane with uniform sur- face charge density a is drawn t

Question

Problem 28: An infinite plane with uniform sur- face charge density a is drawn to the right. A cylindrical Gaussian surface is selected with ends of area A. The ends are parallel to the plane as drawn to the right. The height of the cylinder, the distance between the ends is h. The ra- dius of the ends is r, so A 1rr2 How much charge is enclosed in the Gaussian surface? Select One of the Following: (a) 0 (b) (c) A (d) 20A (e) 20A 2rrho. Problem 29: The figure to the right shows a closed surface (dashed circle) in an electric field map. Is there a net electric flux out of the surface? If so, what is the sign of the electric flux out of the surface? Select One of the Following: (a) positive (b) negative (c) The net flux out of the surface is zero.

Explanation / Answer

question 28.  

the answer is c

question 29

the answer is a

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