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 :

  1. fraction numerator 2 V over denominator L to the power of 2 end exponent end fraction cross times x    
  2. fraction numerator 2 V over denominator rho subscript 0 end subscript L to the power of 2 end exponent end fraction cross times x    
  3. fraction numerator V over denominator L to the power of 2 end exponent end fraction cross times x    
  4. None of these    

The correct answer is: fraction numerator 2 V over denominator L to the power of 2 end exponent end fraction cross times x


    Consider an elemental part of solid at a distance x from left end of width dx. Resistance of this elemental part is

    Book A Free Demo

    +91

    Grade*

    Related Questions to study