A charge of 120 µC is at the centerof a cube of edge 45.0 cm. No othercharges ar

Question

A charge of 120 µC is at the centerof a cube of edge 45.0 cm. No othercharges are nearby. (a) Find the flux through the whole surface ofthe cube.
Enter anumber. 1 N· m2/C

(b) Find the flux through each face of the cube.
Enter anumber. 2 N· m2/C

(c) Would your answers to parts (a) or (b) change if the chargewere not at the center? (Select all that apply.) 3 (a) would change
(b) would change
neither would change


Explain your answer. Enter anumber. Enter anumber. 3 (a) would change
(b) would change
neither would change
3 (a) would change
(b) would change
neither would change

Explanation / Answer

charge q = 120µC
              = 120 * 10 -6 C
Side of the edge a = 45.0 cm                             = 0.45 m (a). the flux through the whole surface of thecube = q / where = permitivity of free space = 8.85 * 10-12 C 2 / N - m 2 So, = 13.6 * 10 6 N - m 2 / C (b). the flux through the each surface of thecube = q / 6 where = permitivity of free space = 8.85 * 10-12 C 2 / N - m 2 So, = 2.26 * 10 6 N - m 2 /C (c). Part ( a) doesn't change      Part ( b ) is changed (b). the flux through the each surface of thecube = q / 6 where = permitivity of free space = 8.85 * 10-12 C 2 / N - m 2 So, = 2.26 * 10 6 N - m 2 /C (c). Part ( a) doesn't change      Part ( b ) is changed where = permitivity of free space = 8.85 * 10-12 C 2 / N - m 2 So, = 2.26 * 10 6 N - m 2 /C (c). Part ( a) doesn't change      Part ( b ) is changed

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