Which of the following statements about flux are true?
The unit of flux is Nm2/C
The total flux through a surface completely enclosing a charge q is q/ε
The total flux through a closed surface can be positive or negative, depending on whether the enclosed charge is positive or negative.
The total flux through any closed surface that does not contain a charge is zero.
When turning a surface inside of an electric field, the maximum flux is achieved if the electric field vector and the surface vector are perpendicular.
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