JEE Advanced 2019 Physics question
A charged shell of radius carries a total charge . Given as the flux of electric field through a closed cylindrical surface of height , radius and with its center same as that of the shell. Here, center of the cylinder is a point on the axis of the cylinder which is equidistant from its top and bottom surfaces. Which of the following option(s) is/are correct? [ is the permittivity of free space]
Answer: (A),(B),(C)
Solution
By Gauss's law . (A) , : the cylinder encloses the whole shell, : correct. (B) A cylinder of radius meets the shell at height from the centre; with half-height the
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