An infinite line charge of uniform electric charge density 
lies along the axis of an electrically conducting infinite cylindrical shell of radius R. At time t = 0, the space inside the cylinder is filled with a material of permittivity 
and electrical conductivity 
. The electrical conduction in the material follows Ohm's law. Which one of the following graphs best describes the subsequent variation of the magnitude of current density j(i) at any point in the material?
Text Solution
Verified by ExpertsC
For infinite line,
Current through an elemental shell;
This current is radially outwards so;
So, 
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