JEE Mains · Physics · STD 12 - 1. Electric charges and fields
Choose the incorrect 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
- A \((c)\) and \((d)\) only
- B \((b)\) and \((d)\) only
- C \((d)\) only
- D \((a)\) and \((c)\) only
Answer & Solution
Correct Answer
(C) \((d)\) only
Step-by-step Solution
Detailed explanation
Since \(\phi=\vec{E} \cdot \vec{A}=E A \cos \theta\) \(\theta=90^{\circ}\) \(\therefore \phi=0\)
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