Four closed surfaces, S1 through S4, together with the charges -2Q, Q, and -Q ar
ID: 2131204 • Letter: F
Question
Four closed surfaces, S1 through S4, together with the charges -2Q, Q, and -Q are sketched in the figure below. (The colored lines are the intersections of the surfaces with the page.) Find the electric flux through each surface. (Use the following as necessary: ?0 and Q.)
?S1 =
?S2 =
?S3 =
?S4 =
Explanation / Answer
electric flux=charge enclosed/epsilon
S1=(-2Q+Q)/epsilon=-Q/epsilon
S2=(-Q+Q)/epsilon=0
S3=(-2Q+Q-Q)/epsilon=-2Q/epsilon
S4=charge enclosed=O hence flux is 0