Physics-
General
Easy

Question

The figure shows a graph between ln invisible function application open vertical bar fraction numerator A subscript n end subscript over denominator A subscript 1 end subscript end fraction close vertical barand ln invisible function application vertical line n vertical line, where A subscript n end subscript is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is ln invisible function application open vertical bar A subscript n over A subscript 1 close vertical bar

  1. 4    
  2. 3    
  3. 2    
  4. 1    

The correct answer is: 4


    A subscript n end subscript equals pi r subscript n end subscript superscript 2 end superscript rightwards double arrow fraction numerator A subscript n end subscript over denominator A subscript 1 end subscript end fraction equals open parentheses fraction numerator r subscript n end subscript over denominator r subscript 1 end subscript end fraction close parentheses to the power of 2 end exponent equals open parentheses fraction numerator n over denominator 1 end fraction close parentheses to the power of 4 end exponent blank left square bracket because r subscript n end subscript proportional to n to the power of 2 end exponent right square bracket
    Taking l o g subscript e end subscript on both the sides log subscript e end subscript invisible function application fraction numerator A subscript n end subscript over denominator A subscript 1 end subscript end fraction equals 4 log subscript e end subscript invisible function application left parenthesis n right parenthesis
    Comparing it with y equals m x plus c, graph (4) is correct

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