Home › NEET UG › Physics › Electric Charges and Fields › Electric flux Φ through a closed surface enclosi…
Electric flux Φ through a closed surface enclosing total charge Q_enc (Gauss's law) equals:
AQ_enc · ε₀
BQ_enc / ε₀
CQ_enc / (4πε₀)
Dε₀ / Q_enc
Answer & Solution
Correct answer: B. Q_enc / ε₀
1. Gauss's law: ∮ E · dA = Q_enc / ε₀.
2. Works for ANY closed surface (Gaussian surface).
3. Only charge ENCLOSED contributes; outside charges have zero net flux.
_Source: NCERT Class 12 Physics Ch 1 §1.10 Gauss's Law_
Related questions
A charged comb picks up small pieces of paper that carry no net charge, because the paper Compared with the tiny nucleus, the electrons around it form a cloud that is:Benjamin Franklin explained early observations by supposing that one type of charge stayedA test charge or a source charge moves, and as a result the force between them:If the two ends of a dipole can be pulled apart, induction can create charged objects withPlaced in a uniform field, such a dipole experiences a turning effect that changes its angTwo equal and opposite charges separated by a small distance form a dipole, characterised Where those lines are packed more densely, the field is: