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Choose the correct statement: (a) The electric lines of force entering into a Gaussian surface provide negative flux. (b) A charge 'q' is placed at the centre of a cube. The flux through all the faces will be the same. (c) In a uniform electric field net flux through a closed Gaussian surface containing no net charge, is zero. (d) When electric field is parallel to a Gaussian surface, it provides a finite non-zero flux. Choose the most appropriate answer from the options given below: (1) (c) and (d) only (2) (b) and (d) only (3) (d) only (4) (a) and (c) only

1. (c) and (d) only
2. (b) and (d) only
3. (d) only
4. (a) and (c) only

Correct answer: (b) and (d) only

Solution

Option (b) is correct because a charge at the center of a cube creates an equal electric field through all faces, resulting in uniform flux distribution. Option (d) is also correct as a parallel electric field to a surface can still produce a non-zero flux depending on the area and orientation.

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