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The green square represents a cross section of a cube.  Use the test charge to explore the direction of the electric field inside the cube (position is given in meters and electric field strength is given in newtons/coulomb). Click-drag the cursor anywhere inside the cube to measure the magnitude of the electric field.  Find the flux through the top, bottom, left, and right sides of the cube.  Restart.

Problem authored by Evelyn Patterson and Scott Bonham and modified by Anne J Cox.
© 2004 by Prentice-Hall, Inc. A Pearson Company