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Answer the following.
A student starts working on a problem on Gauss' theorem to calculate the flux and hence the…
A student starts working on a problem on Gauss' theorem to calculate the flux and hence the electric field at a given point due to a system of discrete charges. The teacher gives instructions and the student responds to each instruction as per her understanding of the concept. State whether the student's response is correct or incorrect. Give a reason for your answer.
Examiner: Calculate the electric flux of a point charge of $2\ \mu\text{C}$, placed 5 cm above the centre of a square plate of side 10 cm, through the given plate.
Student: As the charge is not enclosed by the surface, the flux through the surface is zero.
Answer
Answer
Official answer keyResponse is incorrect. The total flux through the square plate $= \frac{1}{6}\left(\frac{2 \times 10^{-6}}{\varepsilon_0}\right) = 3.77 \times 10^4$ Nm$^2$/C.
From ISC 2025 Practice Physics, question 68(c).
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