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A cube of side a is placed in a uniform field E=6.50 * 10^3 N/C with edges parallel to the field lines.
a) whats the net flux through the cube?
b) what is the flux through each of its six faces?

  • Physics -

    a)Unless the cube has a charge inside, the net flux through all sides is zero, because of Gauss' Law. They should have told you if the cube had a charge inside.

    b)The situation is different if the cube is conducting or nonconducting. If there is no charge and no polarization of the cube, the flux through the two faces will be E a^2 and -Ea^2. There will be no flux thourgh the sides.

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