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Grade 12th passElectrostatics

A thick shell with inner radius R and outer radius 3R has a uniform charge density σ c/m3 . It has a spherical cavity of radius R as shown in the figure. The electric field at the centre of the cavity is

(A) zero.

(B) 2σR/εo

(C) 3σR/4εo

(D) 7σR/12εo

Help appreciated!

Question image for A thick shell with inner radius R and outer radiu
Profile image of curiouscase
11 Years agoGrade 12th pass
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2 Answers

Profile image of Aditya Raghuwanshi
11 Years ago
Electric field inside a charged conductor is always zero...
therefore,ans is zero.
Profile image of curiouscase
11 Years ago
Actually the correct anskwer given in the booklet is D) but I don’t know how it’s possible. Also see the attached image with the problem.

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