A cylindrical conductor has uniform cross-section. Resistivity of its material increase linearly from left end to right end. If a constant current is flowing through it and at a section distance x from left end, magnitude of electric field intensity is E, which of the following graphs is correct
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Let resistivity at a distance 'x' from left end be 
Then electric field intensity at a distance 'x' from left end will be equal to 
where i is the current flowing through the conductor. It means 
or E varies linearly with distance 'x'. But at x = 0, E has non-zero value.
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