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NEET UG PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES
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Understanding
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For a closed surface through which the net flux is zero, each of the following four statements could be true. Which of the statements must be true ? a) There are no charges inside the surface b) The net charge inside the surface is zero c) The electric field is zero everywhere on the surface d) The number of electric field lines entering the surface equals the number leaving the surface
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Correct option: B
b, d
The correct answer is B because, according to Gauss's law, zero net flux implies zero net charge inside the surface, and the number of electric field lines entering must equal the number leaving.
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