# ch23-p013 - the three cube faces that meet at the charge...

This preview shows page 1. Sign up to view the full content.

13. The total flux through any surface that completely surrounds the point charge is q / ε 0 . (a) If we stack identical cubes side by side and directly on top of each other, we will find that eight cubes meet at any corner. Thus, one-eighth of the field lines emanating from the point charge pass through a cube with a corner at the charge, and the total flux through the surface of such a cube is q /8 ε 0 . Now the field lines are radial, so at each of
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: the three cube faces that meet at the charge, the lines are parallel to the face and the flux through the face is zero. (b) The fluxes through each of the other three faces are the same, so the flux through each of them is one-third of the total. That is, the flux through each of these faces is (1/3)( q /8 ε ) = q /24 ε . Thus, the multiple is 1/24 = 0.0417....
View Full Document

## This note was uploaded on 09/07/2010 for the course PHYS 242 taught by Professor Hu during the Fall '10 term at The Petroleum Institute.

Ask a homework question - tutors are online