Physics
General
Easy
Question
A cylindrical solid of length L and radius a is having varying resistivity given by r = r0 x where r0 is a positive constant and x is measured from left end of solid. The cell shown in the figure is having emf V and negligible internal resistance. The electric field as a function of x is best described by :



 None of these
The correct answer is:
Consider an elemental part of solid at a distance x from left end of width dx. Resistance of this elemental part is
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