alleryThe electric field at the centre of a uniformly-charged thin spherical SHELL of radius R is:
Ak Q / R²
Bk Q / R
CZero
DInfinite
Answer & Solution
Correct answer: C. Zero
1. By Gauss's law applied to a Gaussian surface INSIDE the shell, Q_enc = 0.
2. So E inside the shell is zero everywhere — including the centre.
3. Just outside: E = k Q / R². This is the shell theorem.
_Source: syllabus Physics Ch 1 §1.10 Field due to a Uniformly Charged Shell_
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