A hollow cylinder of length l and radius R is cut into two identical parts along length and placed in region of uniform electric field E, as shown in the given figure. The electric flux along with the curved surface is

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2πRlE

πRlE

ERl

2REl

answer is D.

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Detailed Solution

area of cross section perpendicular to E is 2Rl flux =EA= E2Rl

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