A closed surface contains two equal and opposite charges. The net electric flux from thesurface will be
Correct answer: A. Zero.
- A. Zero.
- B. Positive.
- C. Negative.
- D. Undetermined.
Explanation
Gauss's Law states that the net electric flux through a closed surface is equal to the net charge enclosed divided by the permittivity of free space. In this scenario, the surface encloses two equal and opposite charges, resulting in a net charge of zero. Therefore, the net electric flux is zero. The other options are incorrect because they incorrectly assume a net positive or negative charge, or suggest that the flux cannot be determined when it can be calculated using Gauss's Law.
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About Electric Field
An electric field is the force experienced per unit positive test charge, with the field of a point charge given by E = kQ/r² and directed away from positive charges or toward negative charges. Questions involve field lines, superposition and force on a charge, while electric field must be distinguished from electric potential.
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