વિદ્યુતભાર પર કેન્દ્રિત 8.0 cm ત્રિજ્યાવાળી ગોળાકાર ગાઉસિયન સપાટીમાંથી, એક બિંદુવત વિદ્યુતભારને કારણે \(-2 \times 10^4 \mathrm{Nm}^2 \mathrm{C}^{-1}\) વિદ્યુત ફ્લક્સ પસાર થાય છે. બિંદુવત વિદ્યુતભારનું મૂલ્ય છે :
(આપેલ છે \(\epsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 \mathrm{~N}^{-1} \mathrm{~m}^{-2}\) )

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.