Physics-
General
Easy

Question

The number of particles crossing the unit area perpendicular to the x-axis per unit time is given by : N equals negative D open parentheses fraction numerator n subscript 2 end subscript minus n subscript 1 end subscript over denominator x subscript 2 end subscript minus x subscript 1 end subscript end fraction close parentheseswhere n1 and n2 are the numbers of particles per unit volume for the values of x meant to be x1 and x2 respectively. What is the dimensional formula for the diffusion constant D ?

  1. M0LT2  
  2. M0L2T4  
  3. M0LT–3  
  4. M0L2T­–1  

The correct answer is: M0L2T­–1

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