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A thick shell with inner radius R and outer radius 3R has a uniform charge density σ c/m 3 . 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/ε o (C) 3σR/4ε o (D) 7σR/12ε o Help appreciated!

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
Grade:12th pass

2 Answers

Aditya Raghuwanshi
24 Points
6 years ago
Electric field inside a charged conductor is always zero...
therefore,ans is zero.
curiouscase
10 Points
6 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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